Subacute rheumatoid arthritis in old age. I. Definitions and methods.
D000367:Age Factors; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology*; D003718:Denmark; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007122:Immunoelectrophoresis; D007841:Latex Fixation Tests; D008297:Male; D008875:Middle Aged; D010146:Pain; D011859:Radiography; D012217:Rheumatoid Factor / Q000097:blood; D013053:Spectrophotometry; D013223:Statistics as Topic
D012217:Rheumatoid Factor