1. Territorial Gastroenterology Service, ASL BAT, Andria (BT), Italy
2. Department of Medical and Surgical Sciences, Post-graduate School of Digestive Diseases, Catholic University, Rome, Italy
3. Division of Pathology, “L. Bonomo” Hospital, ASL BAT, Andria (BT), Italy
4. Department of Digestive Surgery, “A. Gemelli” IRCCS Foundation, School of Medicine, Catholic University, Rome, Italy