1. Gastroenterology Unit, Nazareth EMMS Hospital, Nazareth, Israel
2. The Azrieli Faculty of Medicine, Bar Ilan University, Nazareth, Israel
3. Gastroenterology Unit, Department of Internal Medicine, University of Genoa, Genoa, Italy
4. Department of Digestive Diseases, Campus Bio Medico University of Rome, Rome, Italy
5. Gastroenterology Unit, Azienda Ospedale Università di Padova, Padua, ItalyI
6. Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy