title: Epidemiologic methods and methodologic vigilance.
authors: R I
authors: RI
authors: Horwitz
authors: D F
authors: DF
authors: Ransohoff
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D004812:Epidemiologic Methods; D006801:Humans; D012107:Research Design / Q000592:standards*; D013223:Statistics as Topic