S.Orsola-Malpighi Hospital - Gastroenterology Unit, S.Orsola-Malpighi Hospital - Gastroenterology Unit, Fondazione Poliambulanza, S. Maria delle Croci Hospital, AUSL Romagna, Azienda USL di Modena, Guglielmo da Saliceto Hospital, University of Bologna - Gastroenterology and Endoscopy Unit, Valduce Hospital, ASST Rhodense, Ospedale Maggiore della Carità, Centro Traumatologico-Ortopedico Hospital, University of Bologna - Gastroenterology and Endoscopy Unit, Nuovo Regina Margherita Hospital - Digestive Endoscopy Unit, Valduce Hospital and Independent

University of Bologna - Department of Medical and Surgical Sciences, University College London Hospital - Department of Gastroenterology, University of Bologna - Department of Medical and Surgical Sciences, University College London Hospital - Department of Gastroenterology, University of Bologna - Gastroenterology and Endoscopy Unit, University of Bologna - Gastroenterology and Endoscopy Unit and University of Leeds - Leeds Institute of Medical Research at St. James’s