1. Gastroenterology and Digestive Endoscopy Unit, 47121 Forlì, Italy
2. Section of Gastroenterology & Hepatology, Department of Health Promotion Sciences Maternal and Infant Care, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, 90127 Palermo, Italy
3. Pathology Department, M. Bufalini Hospital, Emilia Romagna, 47521 Cesena, Italy
4. Pathology Department, G.B. Morgagni-L. Pierantoni Hospital, Emilia-Romagna, 47121 Forlì, Italy
5. Endoscopy Unit, Humanitas Clinical and Research Center-IRCCS, 20089 Rozzano, Italy