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Tanaka Y, Suzuki M, Nakamura H, Toyoizumi S, Zwillich SH; Tofacitinib Study Investigators.Tanaka Y, et al. Among authors: nakamura h.Arthritis Care Res (Hoboken). 2011 Aug;63(8):1150-8. doi: 10.1002/acr.20494.Arthritis Care Res (Hoboken). 2011.PMID: 21584942Free article.Clinical Trial.