1. Department of Gastroenterology, Portsmouth University Hospital NHS Trust, Portsmouth, UK
2. Gastroenterology Department, Portuguese Oncology Institute of Porto, Porto, Portugal
3. Center for Research in Health Technologies and Information Systems (CINTESIS), Faculty of Medicine, Porto, Portugal
4. Gastroenterology Department, Endoscopy Unit, Complejo Hospitalario de Navarra, Navarrabiomed-UPNA-IdiSNA, Pamplona, Spain
5. Gastroenterology Division, Edouard Herriot Hospital, Lyon, France
6. Academic Department of Gastroenterology, Royal Hallamshire Hospital, Sheffield, UK
7. Digestive Endoscopy and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy
8. Università Cattolica del Sacro Cuore, Rome, Italy
9. Gastroenterology and Digestive Endoscopy Unit, Ospedale dei Castelli, Ariccia, Rome, Italy
10. Department of Biomedical Sciences, Humanitas University, Milan, Italy
11. Digestive Endoscopy Unit, IRCSS Humanitas Research Hospital, Milan, Italy
12. Department of Gastroenterology, University College London Hospitals, London, UK
13. Department of Gastroenterology, Hôpital Nord, Assistance publique des hôpitaux de Marseille, Marseille, France
14. Department of Medicine I, University Medical Center Mainz, Mainz, Germany
15. GastroZentrum Lippe, Bad Salzuflen, Germany
16. Nuovo Regina Margherita Hospital, Rome, Italy
17. Department of Translational and Precision Medicine, "Sapienza" University of Rome, Rome, Italy
18. Vita Salute, San Raffaele Hospital, Milan, Italy
19. Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, The Netherlands
20. Department of Medical and Surgical Sciences, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy