Sisters doing it for themselves.
Szarewski
Anne
A
Cancer Research UK Centre for Epidemiology, Mathematics and Statistics, Wolfson Institute of Preventive Medicine, London, UK. anne.szarewski@cancer.org.uk
D003277:Contraceptives, Oral, Combined / Q000008:administration & dosage*; D003657:Decision Making; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D008597:Menstrual Cycle / Q000187:drug effects* / Q000523:psychology; D010358:Patient Participation; D016387:Women's Health
D003277:Contraceptives, Oral, Combined