2 GI Unit, ASST Bergamo Est, Seriate, Italy. Electronic address: [email protected].
3 Digestive Endoscopy Unit, ASST Pavia, Vigevano, Italy.
4 Division of Gastroenterology, Valduce Hospital, Como, Italy.
5 Digestive Endoscopy Unit, Niguarda Hospital, Milano, Italy.
6 Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy.
7 Division of Gastroenterology, Alessandria Hospital, Alessandria, Italy.
8 Division of Gastroenterology, Legnano Hospital, Legnano, Italy.
9 Department of Gastroenterology, ASST Rhodense, Rho and Garbagnate Milanese Hospitals, Rho, Italy.
10 Division of Gastroenterology, Maggiore della Carità Hospital, Novara, Italy.
11 Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy; Division of Gastroenterology, Alessandria Hospital, Alessandria, Italy; Division of Gastroenterology, Legnano Hospital, Legnano, Italy; Department of Gastroenterology, ASST Rhodense, Rho and Garbagnate Milanese Hospitals, Rho, Italy; Division of Gastroenterology, Maggiore della Carità Hospital, Novara, Italy; Department of Pathophysiology and Transplantation, University of Milano, Italy.
12 Endoscopy Unit, S. Croce e Carle Hospital, Cuneo, Italy.