Need for acceptable measures of disease progression in rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging* / Q000188:drug therapy; D003953:Diagnosis-Related Groups; D006801:Humans; D008662:Metacarpophalangeal Joint / Q000000981:diagnostic imaging; D011859:Radiography; D012720:Severity of Illness Index