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pro vyhledávání: '"Luella Englehart"'
Autor:
Don P. Buesching, Thomas W. Croghan, Robert L. Obenchain, Luella Englehart, Tamra Lair, William H. Crown
Publikováno v:
Statistics in Medicine. 17:1943-1958
Non-randomized studies of treatment effects have come under criticism because of their failure to control for potential biases introduced by unobserved variables correlated with treatment selection and outcomes. This paper describes the basic concept