1 Second Academic Department of Gastroenterology, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
2 Hepatogastroenterology Unit, Second Department of Internal Medicine-Propaedeutic, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
3 Academic Unit of Gastroenterology, Sheffield Teaching Hospitals, Sheffield, UK.
4 Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK.
5 Department of Gastroenterology and Hepatology, Ulster Hospital, Dundonald, Northern Ireland.
6 Department of Gastroenterology, General Hospital of Nea Ionia "Konstantopoulio-Patision", Athens, Greece.
7 TUM School of Medicine and Health, Technische Universität München, Munich, Germany.
8 Department of Gastroenterology, University Hospital Augsburg, Augsburg, Germany.
9 Department of Gastroenterology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium.
10 Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy.
11 Endoscopy Unit, Humanitas Clinical and Research Center - IRCCS, Rozzano, Italy.
12 Department of Gastroenterology and Hepatology, University Hospitals Leuven, and TARGID, KU Leuven, Leuven, Belgium.
13 Institute of Gastroenterology and Hepatology, Emek Medical Center, Afula, Israel.
14 Rappaport Family Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel.