title: Clinical trials and epidemiology.
authors.affiliation: Medical Department, CIBA-GEIGY Ltd, Basle, Switzerland.
authors.forename: S J
authors.initials: SJ
authors.lastname: Senn
mesh_terms: D015984:Causality; D002986:Clinical Trials as Topic; D004813:Epidemiology; D006801:Humans; D011897:Random Allocation