Long‐Term Efficacy and Safety of Etrasimod for Ulcerative Colitis: Results From the Open‐Label Extension of the OASIS Study: 764. (October 2019) - Chiorean, Michael; Vermeire, Séverine; Panés, Julian; Peyrin‐Biroulet, Laurent; Zhang, Jinkun; Sands, Bruce E.; Lazin, Krisztina; Cabell, Chris H.; Naik, Snehal U.; Klassen, Preston; Sandborn, William J.