1. Department of Life, Health, and Environmental Sciences, Division of Gastroenterology, Hepatology, and Nutrition, University of L’Aquila, Piazza S. Tommasi, 1, Coppito, 67100 L’Aquila, Italy
2. Pathology Unit, San Salvatore Hospital, Via Lorenzo Natali, 1, Coppito, 67100 L’Aquila, Italy