Patterns of oral contraceptive use in the United Kingdom.
Vessey
M P
MP
University Department of Community Medicine and General Practice, Radcliffe, Infirmary, Oxford, UK.
Thorogood
M
M
D000328:Adult; D000367:Age Factors; D003268:Contraception Behavior / Q000639:trends*; D003276:Contraceptives, Oral / Q000008:administration & dosage*; D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D003279:Contraceptives, Oral, Sequential / Q000008:administration & dosage*; D004363:Drug Utilization; D005260:Female; D006801:Humans; D011372:Progestins / Q000008:administration & dosage; D006113:United Kingdom
D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003279:Contraceptives, Oral, Sequential; D011372:Progestins