1. Royal Free Unit for Endoscopy, The Royal Free Hospital, University College London Institute for Liver and Digestive Health, London, United Kingdom of Great Britain and Northern Ireland
2. Academic Unit of Gastroenterology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom of Great Britain and Northern Ireland
3. Division of Clinical Medicine, School of Medicine and Population Health, The University of Sheffield, Sheffield, United Kingdom of Great Britain and Northern Ireland
4. Wolfson Unit for Endoscopy, St Mark‘s Hospital and Academic Institute, London, United Kingdom of Great Britain and Northern Ireland
5. Department of Gastroenterology, Imperial College Healthcare NHS Trust, London, United Kingdom of Great Britain and Northern Ireland
6. Department of Gastroenterology, South Tyneside and Sunderland NHS Foundation Trust, Sunderland, United Kingdom of Great Britain and Northern Ireland
7. Department of Gastroenterology, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, United Kingdom of Great Britain and Northern Ireland
8. Directorates of Endoscopy and Gastroenterology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom of Great Britain and Northern Ireland
9. Division of Gastroenterology, Ulster Hospital, Dundonald, United Kingdom of Great Britain and Northern Ireland
10. Department of Digestive Disorders, Aberdeen Royal Infirmary, Aberdeen, United Kingdom of Great Britain and Northern Ireland
11. Leeds Gastroenterology Institute, St James‘s University Hospital, Leeds, United Kingdom of Great Britain and Northern Ireland
12. Department of Gastroenterology, Portsmouth Hospitals University NHS Trust, Portsmouth, United Kingdom of Great Britain and Northern Ireland
13. Department of Gastroenterology, Royal Liverpool and Broadgreen Hospitals NHS Trust, Liverpool, United Kingdom of Great Britain and Northern Ireland