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Kaplan–Meier curve of the retention rate of tocilizumab therapy. a Tocilizumab retention rate in all 229 cases. b Tocilizumab retention rates by cause of discontinuation. c Tocilizumab retention rates in patients who did (n = 127) and did not (n = 102) receive concomitant MTX. d Tocilizumab retention rates in patients who did (n = 144) and did not (n = 85) previously receive anti-TNF therapy
