Oral contraceptives and rheumatoid arthritis; further evidence for a protective effect independent of duration of pill use.
Hazes
J M
JM
Department of Rheumatology, University Hospital, Leiden, The Netherlands.
Dijkmans
B A
BA
Vandenbroucke
J P
JP
De Vries
R R
RR
Cats
A
A
D000328:Adult; D001172:Arthritis, Rheumatoid / Q000097:blood / Q000453:epidemiology* / Q000517:prevention & control; D016022:Case-Control Studies; D003278:Contraceptives, Oral, Hormonal / Q000008:administration & dosage* / Q000009:adverse effects; D004334:Drug Administration Schedule; D005260:Female; D015804:HLA-DR4 Antigen / Q000032:analysis; D006801:Humans; D015994:Incidence; D008875:Middle Aged; D009426:Netherlands / Q000453:epidemiology; D010045:Outpatients; D012307:Risk Factors
D003278:Contraceptives, Oral, Hormonal; D015804:HLA-DR4 Antigen