title: Principles of epidemiological research on drug effects.
authors.forename: P M
authors.initials: PM
authors.lastname: Gargiullo
authors.forename: P
authors.initials: P
authors.lastname: Kramarz
authors.forename: F
authors.initials: F
authors.lastname: DeStefano
authors.forename: R T
authors.initials: RT
authors.lastname: Chen
mesh_terms: D064420:Drug-Related Side Effects and Adverse Reactions; D015340:Epidemiologic Research Design; D006801:Humans