title: Oral contraceptives and rheumatoid arthritis: new data from the Royal College of General Practitioners' Oral Contraception Study.
authors.affiliation: Royal College of General Practitioners, Manchester Research Unit.
authors.forename: P C
authors.initials: PC
authors.lastname: Hannaford
authors.forename: C R
authors.initials: CR
authors.lastname: Kay
mesh_terms: D000328:Adult; D000367:Age Factors; D001172:Arthritis, Rheumatoid / Q000453:epidemiology* / Q000517:prevention & control; D003278:Contraceptives, Oral, Hormonal / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D006801:Humans; D015994:Incidence; D008875:Middle Aged; D010821:Physicians, Family; D012189:Retrospective Studies; D012307:Risk Factors; D012955:Societies, Medical; D006113:United Kingdom / Q000453:epidemiology
chemical_list: D003278:Contraceptives, Oral, Hormonal