Efficacy of Tofacitinib in Patients With Ulcerative Colitis by Prior Tumor Necrosis Factor Inhibitor Treatment Status: Results From OCTAVE Induction and Maintenance Studies: 640. (October 2017) - Dubinsky, Marla C.; Peyrin‐Biroulet, Laurent; Melmed, Gil Y.; Hou, Jason K.; Woodworth, Deborah A.; Friedman, Gary S.; Zhang, Haiying; Maller, Eric; Quirk, Daniel; Nduaka, Chudy I.; Su, Chinyu