title: Case control study finds long-term pill use is associated with higher risk of benign liver tumors.
mesh_terms: D001695:Biology; D003267:Contraception; D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D003625:Data Collection; D003710:Demography; D005193:Family Planning Services; D008099:Liver; D010827:Physiology; D011153:Population; D011157:Population Dynamics; D012106:Research; D013995:Time; D013997:Time Factors
chemical_list: D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal
keywords: Biology; Comparative Studies; Contraception; Contraceptive Agents, Estrogen; Contraceptive Methods--side effects; Data Collection; Demographic Factors; Family Planning; Hepatic Effects; Longterm Effects; Oral Contraceptives--side effects; Physiology; Population; Population Dynamics; Research Methodology; Studies; Time Factors