title: Some methodological problems in the investigation of rare adverse reactions to oral contraceptives.
mesh_terms: D000293:Adolescent; D000328:Adult; D001941:Breast Diseases / Q000139:chemically induced; D001943:Breast Neoplasms / Q000139:chemically induced; D003270:Contraceptive Agents / Q000008:administration & dosage; D003273:Contraceptive Devices / Q000706:statistics & numerical data; D003276:Contraceptives, Oral / Q000009:adverse effects*; D003937:Diagnosis, Differential; D004812:Epidemiologic Methods; D005163:Factor Analysis, Statistical; D005260:Female; D005500:Follow-Up Studies; D006760:Hospitalization; D006801:Humans; D010865:Pilot Projects; D011446:Prospective Studies; D011655:Pulmonary Embolism / Q000139:chemically induced / Q000175:diagnosis / Q000453:epidemiology; D012189:Retrospective Studies; D013923:Thromboembolism / Q000139:chemically induced / Q000175:diagnosis / Q000453:epidemiology / Q000401:mortality; D013924:Thrombophlebitis / Q000139:chemically induced / Q000175:diagnosis; D013927:Thrombosis / Q000139:chemically induced / Q000453:epidemiology
chemical_list: D003270:Contraceptive Agents; D003276:Contraceptives, Oral