... Udagawa N, Takami M, KotakeS, Nakagawa N, Kinosaki M, Yamaguchi K, Shima N, Yasuda H,Morinaga T, Higashio K, Martin TJ, Suda T: Tumor necrosisfactor alpha stimulates osteoclast differentiation ... involvement, although characteristicallysymmetrical, can range from a monoarticular pattern to a highly polyarticular pattern, and joint damage can span frommild cartilage degradation to progressive ... RA is still regarded as a singledisorder.Biomarkers and clinical markersDisease activity, joint damage and functional impairment formthe anchor points of the natural history of RA, and arecharacterized...