1. Digestive Endoscopy, Nuovo Regina Margherita Hospital, Rome, Italy
2. Translational Gastroenterology Unit, John Radcliffe Hospital, University of Oxford, and Oxford NIHR Biomedical Research Centre, Oxford, United Kingdom
3. Valduce Hospital, Como, Italy
4. Digestive Endoscopy Unit, Fondazione Poliambulanza, Brescia, Italy
5. Gastroenterology Unit, Bobigny, France
6. University Hospitals Leuven, KU Leuven, Department of Gastroenterology and Hepatology
7. Institute of Health and Society, University of Oslo Department of Transplantation Medicine, Oslo University Hospital, Norway
8. Department of Gastroenterology and Hepatology Amsterdam University Medical Centers, Amsterdam, The Netherlands
9. CIDES/CINTESIS, Faculty of Medicine, University of Porto, Porto, Portugal
10. Department of Internal Medicine III, Division of Gastroenterology & Hepatology, Medical University of Vienna, Austria; Austrian Society of Gastroenterology and Hepatology (OEGGH): Quality Assurance Working Group, Austria
11. Gastroenterology Unit, Department of Medical and Surgical Sciences, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
12. Institute of Gastroenterology and Hepatology Emek Medical Center Afula, Israel; Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Israel
13. Servicio de Medicina Digestiva. Hospital General Universitario de Alicante. Instituto de Investigación Sanitaria ISABIAL, Alicante, Spain
14. Department of Gastroenterology, Hepatology and Oncology, Center for Postgraduate Medical Education, Warsaw, Poland
15. Gastroenterology Department, Institut de Malalties Digestives i Metabòliques, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer, (IDIBAPS), University of Barcelona, Barcelona, Spain
16. Ηepatogastroenterology Unit, Second Department of Internal Medicine and Research Institute, Athens University, Athens Greece
17. Digestive Disease Unit, Sant'Andrea Hospital, Sapienza University of Rome, Italy
18. Gedyt Endoscopy Center, Buenos Aires, Argentina