1. Department of Digestive Diseases Campus Bio Medico University of Rome Roma Italy
2. Digestive Pathophysiology Unit Baggiovara Hospital Modena Italy
3. Department of Translational Research and New Technology in Medicine and Surgery University of Pisa Pisa Italy
4. General and Bariatric Surgery Unit Department of Surgery 2nd University of Naples Napoli Italy
5. Department of Pathophysiology and Transplantation University of Milan Milan Italy
6. Fondazione IRCCS Ospedale Maggiore Policlinico Milan Italy
7. Gastroenterology Unit Department of Surgery, Oncology and Gastroenterology University of Padua Padova Italy