AF.154 NON-INVASIVE ASSESSMENT OF POSTOPERATIVE DISEASE RECURRENCE IN CROHN'S DISEASE: A MULTICENTER, PROSPECTIVE COHORT STUDY. (September 2021) - Furfaro, F.; Zilli, A.; Craviotto, V.; Aratari, A.; Bezzio, C.; Gilardi, D.; Loy, L.; D'Amico, F.; Saibeni, S.; Papi, C.; Peyrin–Biroulet, L.; Fiorino, G.; et al.