title: Pitfalls of pharmacoepidemiology.
authors.forename: D C
authors.initials: DC
authors.lastname: Skegg
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D003625:Data Collection / Q000592:standards; D016208:Databases, Factual / Q000592:standards*; D005260:Female; D006801:Humans; D013923:Thromboembolism / Q000139:chemically induced*; D020246:Venous Thrombosis / Q000139:chemically induced*
chemical_list: D003276:Contraceptives, Oral