Rheumatoid arthritis and oral contraceptives.
D001172:Arthritis, Rheumatoid / Q000453:epidemiology* / Q000517:prevention & control; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003280:Contraceptives, Oral, Synthetic / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008910:Minnesota
D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic