1. Gastroenterology Unit, Division of Gastroenterology, Hepatology and Nutrition, Department of Life, Health and Environmental Sciences, University of L’Aquila, Piazzale Salvatore Tommasi 1, 67100 L’Aquila, Italy
2. Department of Surgery, University of L’Aquila, 67100 L’Aquila, Italy
3. Division of Radiology, S. Salvatore Hospital, 67100 L’Aquila, Italy