1. Royal Cornwall Hospitals NHS Trust, Truro, Cornwall, UK
2. Medical and Dental Sciences, University of Birmingham, Birmingham, UK
3. Division of Gastroenterology and Hepatology, Johns Hopkins Hospital, Baltimore, Maryland, United States
4. Department of Gastroenterology, Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK
5. Faculty of Science and Engineering, University of Wolverhampton, Wolverhampton, UK
6. Department of Gastroenterology, South Eastern Health and Social Care Trust, Northern Ireland, UK
7. Department of Gastroenterology, NHS Lothian, Edinburgh, Scotland
8. Department of Gastroenterology, University College London Hospitals, London, UK
9. Department of Gastroenterology, University Hospitals Dorset NHS Foundation Trust, Bournemouth, UK
10. Department of Gastroenterology, Cwm Taf Morgannwg Health Board, Merthyr Tydfil, UK
11. Department of Gastroenterology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle, UK
12. Department of Gastroenterology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
13. Department of Surgery, Aneurin Bevan University Health Board, Newport, UK
14. Department of Gastroenterology, Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK