title: Oral contraceptives and risk of venous thromboembolism: impact of duration of use.
authors.forename: T M
authors.initials: TM
authors.lastname: Farley
authors.forename: O
authors.initials: O
authors.lastname: Meirik
authors.forename: M G
authors.initials: MG
authors.lastname: Marmot
authors.forename: C L
authors.initials: CL
authors.lastname: Chang
authors.forename: N R
authors.initials: NR
authors.lastname: Poulter
mesh_terms: D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans; D016017:Odds Ratio; D012307:Risk Factors; D013923:Thromboembolism / Q000139:chemically induced* / Q000453:epidemiology; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral