title: Effect modification and the limits of biological inference from epidemiologic data.
authors.affiliation: Department of Applied Medical Sciences, University of Southern Maine, Portland 04103.
authors.forename: W D
authors.initials: WD
authors.lastname: Thompson
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology / Q000209:etiology; D016022:Case-Control Studies; D004813:Epidemiology; D006801:Humans; D008954:Models, Biological; D012307:Risk Factors