title: Letter: Oral contraceptives and thromboembolism.
mesh_terms: D003276:Contraceptives, Oral / Q000008:administration & dosage / Q000009:adverse effects*; D004967:Estrogens / Q000008:administration & dosage; D005260:Female; D006801:Humans; D013923:Thromboembolism / Q000139:chemically induced*
chemical_list: D003276:Contraceptives, Oral; D004967:Estrogens