1. Division of Gastroenterology and Gastrointestinal Endoscopy, Vita-Salute San Raffaele University–San Raffaele Scientific Institute, Milan, Italy
2. Department of Medicine, Rikshospitalet University Hospital, Oslo, Norway
3. Department of Gastroenterology, Hepatopancreatology and Digestive Oncology, Erasme University Hospital, Université Libre de Bruxelles, Brussels, Belgium
4. Endoscopic Unit, Paoli-Calmettes Institute, Marseilles, France
5. Digestive Endoscopy Unit, Università Cattolica del Sacro Cuore, Rome, Italy
6. Department of Gastroenterology, Instituto Portugues de Oncologia, Porto, Portugal
7. Gedyt Endoscopy Center, Buenos Aires, Argentina
8. Department of Gastroenterology, State Health Centre, Budapest, Hungary
9. Department of Internal Medicine, St. Elisabeth Hospital, Vienna, Austria
10. Department of Gastrointestinal and General Surgery, Helsinki University Central Hospital, Helsinki, Finland
11. Department of Gastroenterology, Nuovo Regina Margherita Hospital, Rome, Italy
12. Department of Gastroenterology, Hospital of Santa Luzia, Viana do Castelo, Portugal
13. Hepatogastroenterology Unit, 2nd Department of Internal Medicine and Research Unit, Attikon University General Hospital, University of Athens, Greece
14. Division of Gastroenterology, Ulster Hospital, Belfast, Northern Ireland
15. Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
16. Department of Gastroenterology, Royal Bournemouth Hospital, Bournemouth, UK