P063 Pouchitis in pediatric ulcerative colitis: preliminary results of the retrospective multicenter study on behalf of the Italian Society for Pediatric Gastroenterology, Hepatology and Nutrition (SIGENP). Issue 4 (6th October 2018) - Dipasquale, V.; Mattioli, G.; Arrigo, S.; Bramuzzo, M.; Strisciuglio, C.; Faraci, S.; Romeo, E.F.; Zuin, G.; Felici, E.; Alvisi, P.; Romano, C.