1. Department of Gastroenterology, Hôpital privé Jean Mermoz, Ramsay Santé, Lyon, France
2. Galilee Medical Center, Gastroenterology, Nahariya, Israel, Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
3. Gastroenterology Unit, Hospital of Imola, University of Bologna, Bologna, Italy