title: Rheumatoid arthritis.
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000188:drug therapy / Q000628:therapy; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D010003:Osteoarthritis / Q000175:diagnosis