Autor: |
Xu J; Department of Epidemiology, School of Public Health, Zhengzhou University, No. 100 of Science Avenue, Zhengzhou, 450001, China., Wang Y; School of Nursing, Hebi Polytechnic, Hebi, 458030, China., Feng H; Department of Infectious Diseases, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China., Liu F; Department of Epidemiology, School of Public Health, Zhengzhou University, No. 100 of Science Avenue, Zhengzhou, 450001, China., Yang H; Department of Epidemiology, School of Public Health, Zhengzhou University, No. 100 of Science Avenue, Zhengzhou, 450001, China. yhy@zzu.edu.cn. |