Rheumatoid arthritis.
D000328:Adult; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000209:etiology / Q000401:mortality / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography; D013583:Synovial Membrane / Q000473:pathology; D006113:United Kingdom