P.11.4: Mucosal Healing with a Second Anti-Tnf in Patients with Ulcerative Colitis After the Failure of the Previous Anti-Tnf Treatment. (15th March 2017) - Papa, A.; Pugliese, D.; De Vitis, I.; D'Aversa, F.; Landi, R.; Felice, C.; Guidi, L.; Armuzzi, A.; Rapaccini, G.L.