title: Risk of venous thrombosis associated with different types of combined oral contraceptive preparations.
authors.forename: Astrid
authors.initials: A
authors.lastname: van Hylckama Vlieg
authors.forename: Frits R
authors.initials: FR
authors.lastname: Rosendaal
mesh_terms: D003277:Contraceptives, Oral, Combined / Q000009:adverse effects*; D017373:Cyproterone Acetate / Q000008:administration & dosage / Q000009:adverse effects; D005260:Female; D006801:Humans; D018570:Risk Assessment; D020246:Venous Thrombosis / Q000209:etiology* / Q000517:prevention & control
chemical_list: D003277:Contraceptives, Oral, Combined; D017373:Cyproterone Acetate