1. Division of Gastroenterology and Endoscopy, “Casa Sollievo della Sofferenza” Hospital, IRCCS, San Giovanni Rotondo, Italy
2. Pathology Unit, “Casa Sollievo della Sofferenza” Hospital, IRCCS, San Giovanni Rotondo, Italy
3. Endoscopy Unit, Humanitas Clinical and Research Center – IRCCS, Rozzano, Italy