Juvenile rheumatoid arthritis.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001171:Arthritis, Juvenile / Q000175:diagnosis*; D001172:Arthritis, Rheumatoid / Q000175:diagnosis; D002648:Child; D006801:Humans; D012217:Rheumatoid Factor / Q000097:blood
D012217:Rheumatoid Factor