title: Incidence of venous thromboembolism in users of combined oral contraceptives. Methods for identifying cases and estimating person time at risk must be detailed.
authors.forename: H
authors.initials: H
authors.lastname: Jick
mesh_terms: D003277:Contraceptives, Oral, Combined / Q000009:adverse effects*; D005260:Female; D006801:Humans; D018570:Risk Assessment; D012307:Risk Factors; D013923:Thromboembolism / Q000139:chemically induced*; D020246:Venous Thrombosis / Q000139:chemically induced*
chemical_list: D003277:Contraceptives, Oral, Combined