1. Department of Gastroenterology, Galilee Medical Center, Nahariya, Israel
2. Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
3. Gastroenterology and Endoscopy Unit, Nazareth Hospital, EMMS, Nazareth, Israel
4. Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
5. Institute of Gastroenterology and Hepatology, Hadassah University Medical Center, Jerusalem, Israel