1. Gastroenterology, Algarve University Hospital Centre, Portimão, Portugal
2. Department of Gastroenterology and Endoscopy unit IIS La Fe, Hospital Universitari i Politecnic La Fe, Valencia, Spain
3. Colorectal Disease Group – Department of General Surgery, Algarve University Hospital Centre, Portimão, Portugal
4. Gastroenterology, University Hospital Augsburg, Augsburg, Germany
5. Gastroenterology, Liverpool University Hospitals NHS Foundation Trust, Liverpool, United Kingdom of Great Britain and Northern Ireland
6. Gastroenterology, Royal Cornwall Hospitals NHS Trust, Truro, United Kingdom of Great Britain and Northern Ireland
7. Endoscopy Department, Northumbria Healthcare NHS Foundation Trust, North Shields, United Kingdom of Great Britain and Northern Ireland
8. Gastroenterology and Endoscopy Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
9. Endoscopy Unit, Hospices Civils de Lyon, Lyon, France
10. Endoscopy, ESGENA Scientific Secretariat, Ferdinand- Sauerbruch-Weg 16, 89075 Ulm, Germany
11. Gastroenterology, Erasme University Hospital, Brussels, Belgium
12. Department of Gastroenterology and Hepatology, University Hospital Leuven, Leuven, Belgium