1. Department of Gastroenterology and Hepatology, St. Antonius Hospital, Nieuwegein, The Netherlands
2. Department of Gastroenterology, University Hospital Leuven, Leuven, Belgium
3. Institut des Maladies de l’Appareil Digestif, CHU and University, Nantes, France
4. Department of Gastroenterology, Portuguese Oncology Institute-Porto, Porto, Portugal
5. Gedyt Endoscopy Center, Buenos Aires, Argentina
6. Department of Endoscopy, Hospital Clinico San Carlos, Madrid, Spain
7. Department of Gastroenterology, Nuovo Regina Margherita Hospital, Rome, Italy
8. Department of Gastroenterology and Interventional Endoscopy, St. John of God Hospital, Regensburg, Germany
9. Department of Gastroenterology, Humanitas Research Hospital, Humanitas University, Milano, Italy
10. Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
11. MRC Cancer Unit, University of Cambridge, Cambridge, United Kingdom