1. Academic Unit of Gastroenterology, Sheffield Teaching Hospitals, Sheffield, UK
2. Department of Breast Surgery, Chesterfield Royal Hospital NHS Foundation Trust, Chesterfield, UK
3. Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
4. Clinic for Internal Medicine, Bethesda Krankenhaus Bergedorf, Hamburg, Germany
5. Department of Gastroenterology, Medical Center Hungarian Defence Forces, Budapest, Hungary
6. Endoscopy Department, Yaroslavl Regional Cancer Hospital, Yaroslavl, Russian Federation
7. Gastroenterology Department, Faculty of Additional Professional Education, Pirogov Russian National Research Medical University, Moscow, Russian Federation
8. Division of Gastroenterology and Hepatology, Antwerp University Hospital, Antwerp, Belgium
9. Department of Gastroenterology, Queen Alexandra Hospital, Portsmouth, UK
10. Department of Gastroenterology, CHC Groupe Santé, Liège, Belgium
11. North Tees and Hartlepool NHS Foundation Trust, Stockton-on-Tees, UK
12. Population Health Sciences Institute, Newcastle University, Newcastle, UK
13. Department of Gastroenterology, Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK
14. Department of Gastroenterology and Hepatology, University Hospitals Leuven, TARGID, KU Leuven, Belgium