1. Gastroenterology Unit, Department of Internal Medicine, University of Genoa, Genoa, Italy
2. Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
3. Gastroenterology Unit, Azienda Ospedale Università di Padova, Padova, Italy
4. Nutritional Unit, Department of Internal Medicine, University of Genoa, Genoa, Italy
5. Division of Internal Medicine and Gastroenterology, Cristo Re Hospital, Rome, Italy
6. Gastroenterology Unit, Rho Hospital, ASST Rhodense, Rho, Italy
7. Gastroenterology Unit, Department of Precision Medicine, University of Campania ‘Luigi Vanvitell’, Naples, Italy
8. Andrea Pasta; Elisa Marabotto; Francesco Calabrese; Shirin Djahandideh Sheijaniare also affiliated to IRCCS, Policlinico San Martino, Genoa, Italy
9. Department of Surgery, Oncology and Gastroenterology, University of Padua, via Giustiniani 2, Padua 35128, Italy