Comparison of evidence of treatment effects in randomized and nonrandomized studies
Citation:
Ioannidis JPA, Haidich A-B, Pappa M, Pantazis N, Kokori SI, Tektonidou MG, Contopoulos-Ioannidis DG, Lau J. Comparison of evidence of treatment effects in randomized and nonrandomized studies. Jama. 2001;286:821–830.
Dept. of Hygiene, Epidemiology and Medical Statistics School of Medicine National and Kapodistrian University of Athens 75, M.Asias Str. Athens 11527, Greece Tel.: +30 210 7462088 npantaz@med.uoa.gr
