ASST Fatebenefratelli-Sacco University Hospital - Gastroenterology Unit, Department of Oncology, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital, Department of Gastroenterology, Monash Health. Faculty of Medicine, Nursing &Health Sciences, Monash University, Department of Gastroenterology, Monash Health. Faculty of Medicine, Nursing &Health Sciences, Monash University, Gastroenterology Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy; Department of Biomedical Sciences for Health, University of Milan, Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital, First Department of Internal Medicine, Università degli Studi di Pavia, Gastroenterology Unit, Rho Hospital, Rho (MI), ASST Rhodense, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy; Division of Gastroenterology, ASST Spedali Civili, Papa Giovanni XXIII Hospital, Gastroenterology and Digestive Endoscopy Units, Department of Gastroenterology and Endoscopy, Maggiore Hospital, ASST Crema, Gastroenterology, G. da Saliceto Hospital, Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital, Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital, Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital, Gastroenterology Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy; Department of Biomedical Sciences for Health, University of Milan, First Department of Internal Medicine, Università degli Studi di Pavia, ASST Rhodense - Gastroenterology Unit, Department of Gastroenterology and Endoscopy, Maggiore Hospital, ASST Crema, I Division of Infectious Diseases, ASST Fatebenefratelli-Sacco, L. Sacco Hospital, Milan, Italy; School of Clinical Medicine, Faculty of Health Science University of Witwatersrand, University of Milan and Gastroenterology Unit –Department of Biomedical and Clinical Sciences FBF -L.Sacco ̧ University Hospital

ASST Rhodense - Gastroenterology Unit, Fondazione Policlinico Universitario A. Gemelli IRCCS, IRCCS Humanitas Research Teaching Hospital, ASST Fatebenefratelli-Sacco University Hospital, University of Florence - Azienda Ospedaliero Universitaria Careggi, Fondazione IRCCS Casa Sollievo della Sofferenza, Azienda Villa Sofia-Cervello, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Naples Federico II, University of Milano-Bicocca, Universita di Torino, University of Padua - Padua General University Hospital, Regional Hospital San Camillo-Forlanini, Antonio Cardarelli Hospital, San Filippo Neri Hospital, AO Ordine Mauriziano - Gastroenterology Unit, University of Rome Tor Vergata, UOSD Endoscopia Digestiva, Ospedale Alto Vicentino, AULSS 7 Pedemontana, Santorso (VI), University of Milan, Policlinico Campus Bio Medico - Gastroenterology and Endoscopy Unit, University of Brescia, University of Palermo, University of Padua, Azienda Ospedaliera-Universitaria Pisana, Ospedale Maggiore - Pediatric Gastroenterology Unit, Fondazione Poliambulanza, IRCCS Sacro Cuore Don Calabria - Gastroenterology Unit, Ospedale Mons. Dimiccoli - Gastroenterology Unit, University of Pavia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Humanitas University, ASST Fatebenefratelli-Sacco University Hospital, Azienda Ospedaliero-Universitaria Careggi, Fondazione IRCCS Casa Sollievo della Sofferenza, Azienda Villa Sofia-Cervello, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, ASST Rhodense, IRCCS Humanitas Research Teaching Hospital and Gastroenterology Unit, Rho Hospital, Rho (MI), ASST Rhodense