1 Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona Hospital Trust, Unit of General and Pancreatic Surgery - The Pancreas Institute Verona, Verona, Italy.
2 Department of Hygiene and Epidemiology, Faculty of Public Health, Medical University of Varna, Varna, Bulgaria.
3 Department of Gastroenterology and Hepatology, Radboud University Medical Centre, Nijmegen, Netherlands.
4 Ellen and Pinchas Mamber Institute of Gastroenterology and Hepatology, Emek Medical Center, Afula, Israel.
5 Endoscopy Center, Cheikh Khalifa University Hospital / Mohammed VI University of Health and Sciences, Casablanca, Morocco.
6 Department of Surgery, Oncology and Gastroenterology, University of Padova, University Hospital of Padova, Padova, Italy.