1. Department of Medical Sciences, Section of Gastroenterology, University of Foggia, Foggia, Italy
2. Department of Medicine, Gastroenterology and Digestive Endoscopy Unit, the Pancreas Institute, University Hospital of Verona, Verona, Italy
3. Pancreato-biliary Endoscopy and EUS Division, Pancreas Translational and Clinical Research Center, San Raffaele Scientific Institute IRCCS, Milan, Italy
4. Department of Medicine, Gastroenterology and Digestive Endoscopy Unit, Augusto Murri Hospital, Fermo, Italy
5. Gastroenterology Unit, Istituto Oncologico Veneto IOV-IRCCS, Padova, Italy
6. Endoscopy Service, Department of Diagnostic and Therapeutic Services, Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione, Palermo, Italy