Triplet Therapy, Transplantation, and Maintenance until Progression in Myeloma.

Autor: Richardson PG; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Jacobus SJ; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Weller EA; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Hassoun H; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Lonial S; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Raje NS; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Medvedova E; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., McCarthy PL; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Libby EN; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Voorhees PM; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Orlowski RZ; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Anderson LD Jr; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Zonder JA; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Milner CP; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Gasparetto C; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Agha ME; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Khan AM; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Hurd DD; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Gowin K; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Kamble RT; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Jagannath S; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Nathwani N; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Alsina M; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Cornell RF; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Hashmi H; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Campagnaro EL; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Andreescu AC; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Gentile T; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Liedtke M; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Godby KN; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Cohen AD; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Openshaw TH; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Pasquini MC; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Giralt SA; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Kaufman JL; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Yee AJ; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Scott E; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Torka P; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Foley A; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Fulciniti M; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Hebert K; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Samur MK; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Masone K; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Maglio ME; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Zeytoonjian AA; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Nadeem O; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Schlossman RL; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Laubach JP; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Paba-Prada C; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Ghobrial IM; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Perrot A; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Moreau P; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Avet-Loiseau H; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Attal M; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Anderson KC; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France., Munshi NC; From the Department of Medical Oncology, Dana-Farber Cancer Institute, Jerome Lipper Multiple Myeloma Center (P.G.R., M.F., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), the Department of Data Science, Dana-Farber Cancer Institute (S.J.J., K.H.), the Division of Hematology and Oncology, Boston Children's Hospital (E.A.W.), the Center for Multiple Myeloma, Massachusetts General Hospital (N.S.R., A.J.Y.), Harvard Medical School (P.G.R., S.J.J., E.A.W., N.S.R., A.J.Y.. M.F., K.H., M.K.S., K.M., M.E.M., A.A.Z., O.N., R.L.S., J.P.L., C.P.-P., I.M.G., K.C.A., N.C.M.), and the Veterans Affairs Boston Healthcare System (N.C.M.), Boston, and the Department of Medical Oncology, Davenport-Mugar Cancer Center, Cape Cod Hospital, Hyannis (T.H.O.) - all in Massachusetts; Myeloma Service, the Department of Medicine, Memorial Sloan Kettering Cancer Center (H. Hassoun, S.A.G.), and the Division of Hematology and Medical Oncology, Icahn School of Medicine at Mount Sinai (S.J.), New York, the Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo (P.L.M., P.T.), and State University of New York Upstate Medical University, Syracuse (T.G.) - all in New York; the Winship Cancer Institute of Emory University, Atlanta (S.L., J.L.K.); Knight Cancer Institute, Oregon Health and Science University, Portland (E.M., E.S.); the Division of Medical Oncology and Fred Hutchinson Cancer Research Center, University of Washington, Seattle (E.N.L.); the Department of Hematologic Oncology and Blood Disorders, Levine Cancer Institute, Atrium Health, Charlotte (P.M.V.), Duke University Medical Center, Durham (C.G.), and the Hematology and Oncology-Cancer Center, Atrium Health Wake Forest Baptist Medical Center, Winston-Salem (D.D.H.) - all in North Carolina; the Department of Lymphoma and Myeloma, University of Texas M.D. Anderson Cancer Center (R.Z.O.), and Center for Cell and Gene Therapy, Baylor College of Medicine and Houston Methodist Hospital (R.T.K.), Houston, and Myeloma, Waldenstrom's, and Amyloidosis Program, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas (L.D.A.) - all in Texas; the Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, Detroit (J.A.Z.), and the Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor (E.L.C.) - both in Michigan; the Division of Hematology and Oncology, University of Mississippi Medical Center, Jackson (C.P.M.); University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh (M.E.A.), and the Abramson Cancer Center, University of Pennsylvania, Philadelphia (A.D.C.) - both in Pennsylvania; the Division of Hematology, Ohio State University Comprehensive Cancer Center, Columbus (A.M.K.); the Department of Bone Marrow Transplant and Cellular Therapy, University of Arizona, Tucson (K.G.); Judy and Bernard Briskin Center for Multiple Myeloma Research, City of Hope Comprehensive Cancer Center, Duarte (N.N.), and the Department of Medicine, Division of Hematology, Stanford University, Stanford (M.L.) - both in California; the Department of Blood and Marrow Transplant and Cellular Immunotherapy, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida (M. Alsina); Vanderbilt University Medical Center, Nashville (R.F.C.); the Division of Hematology Oncology, Medical University of South Carolina, Charleston (H. Hashmi); Northern Light Eastern Maine Medical Center Cancer Care, Brewer (A.C.A.), and the Cancer Care Center of Maine, Bangor (T.H.O.); O'Neal Comprehensive Cancer Center, the University of Alabama at Birmingham, Birmingham (K.N.G.); the Center for International Blood and Marrow Transplant Research (CIBMTR), Division of Hematology and Oncology, Department of Medicine, Medical College of Wisconsin, Milwaukee (M.C.P.); the National Marrow Donor Program, CIBMTR, Minneapolis (A.F.); and the Department of Hematology (A.P., M. Attal) and Unit for Genomics in Myeloma (H.A.-L.), Institut Universitaire du Cancer de Toulouse-Oncopole, University Hospital, Toulouse, and the Department of Hematology, University Hospital Hôtel-Dieu, Nantes (P.M.) - both in France.

Publikováno v: The New England journal of medicine [N Engl J Med] 2022 Jul 14; Vol. 387 (2), pp. 132-147. Date of Electronic Publication: 2022 Jun 05.

Content validity of the PedsQL™ 3.2 Diabetes Module in newly diagnosed patients with Type 1 diabetes mellitus ages 8-45.

Autor: Varni JW; Department of Pediatrics, College of Medicine, Department of Landscape Architecture and Urban Planning, College of Architecture, Texas A&M University, 3137 TAMU, College Station, TX, 77843-3137, USA, jvarni@arch.tamu.edu., Curtis BH, Abetz LN, Lasch KE, Piault EC, Zeytoonjian AA

Publikováno v: Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation [Qual Life Res] 2013 Oct; Vol. 22 (8), pp. 2169-81. Date of Electronic Publication: 2012 Dec 27.