OC.09.6 PREDICTIVE VALUE OF MILAN ULTRASOUND CRITERIA IN ULCERATIVE COLITIS: A PROSPECTIVE OBSERVATIONAL COHORT STUDY. (September 2021) - Allocca, M.; Dell'Avalle, C.; Furfaro, F.; Craviotto, V.; Zilli, A.; D"Amico, F.; Peyrin–Biroulet, L.; Fiorino, G.; Danese, S.