Gastroenterology and Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy. angelozullo66@yahoo.it. Section of Gastroenterology, Riuniti Hospitals, Foggia, Italy. Gastroenterology Unit, Nuovo Ospedale Civile Sant'Agostino-Estense, Baggiovara-Modena, Italy. Gastroenterology Unit, Sapienza University of Rome, Polo Pontino, Latina, Italy. Gastroenterology and Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy.