1. Division of Surgery and Interventional Science University College London (UCL) London UK
2. Department of Gastroenterology University college London hospital (UCLH) London UK
3. Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS) University College London London UK
4. NYU Langone New York USA
5. Department of Gastroenterology and Hepatology Ramon y Cajal University Hospital, IRYCIS, University of Alcala Madrid Spain
6. Statsconsultancy Ltd Amersham UK
7. NIHR Nottingham Digestive Diseases Biomedical Research Centre Nottingham University Hospitals Nottingham UK
8. Department of Gastroenterology Washington University School of Medicine in St. Louis St. Louis Missouri USA
9. Department of Gastroenterology Osnabrück Clinic Osnabrück Germany
10. Department of Gastroenterology Kings College Hospital London UK
11. Royal Free Unit for Endoscopy and Centre for Gastroenterology Royal Free NHS Foundation Trust London UK
12. Department of Gastroenterology Bradford Teaching Hospitals Foundation Trust Bradford UK
13. Department of Gastroenterology University Hospital Southampton NHS Foundation Trust Southampton UK
14. Department of Gastroenterology Guy's and St Thomas' Foundation Trust London UK
15. Department of Gastroenterology Belfast Health and Social Care Trust Belfast UK
16. Department of Gastroenterology Gloucestershire Hospitals NHS Foundation Trust ‐ Cheltenham General Hospital Cheltenham UK
17. Department of Gastroenterology Portsmouth Hospitals NHS Trust Portsmouth UK
18. Sindelfingen‐Böblingen Clinic Böblingen Germany
19. Horst Schmidt Clinics Wiesbaden Germany
20. Department of Gastroenterology University Hospital Center Nantes France
21. Columbia University Medical Centre New York USA