1. Department of Gastroenterology, Hepatology and Digestive Oncology, Erasme University Hospital Université Libre de Bruxelles, Brussels, Belgium
2. Gedyt Endoscopy Center, Buenos Aires, Argentina
3. Robert-Bosch-Krankenhaus, Abteilung für Gastroenterologie, Hepatologie und Endokrinologie, Stuttgart, Germany
4. Department of Gastroenterology and Hepatology, Université catholique de Louvain, CHU UCL Namur, Yvoir, Belgium
5. Service d'Hépato-gastroentérologie, Hôpital Nord, Marseille, France
6. Department of Surgery, Amsterdam Gastroenterology and Metabolism, Academic Medical Center Amsterdam, Amsterdam, The Netherlands
7. Gastroenterology Unit, Department of Surgery, Hospital Beatriz Ângelo, Loures, Portugal
8. Dept. of Gastroenterology, Medical Centre Hungarian Defense Forces, Budapest, Hungary
9. Semmelweis University, 1st Department of Surgery, Endoscopy Unit, Budapest, Hungary
10. Department of Gastroenterology and Hepatology, Institute of Clinical and Experimental Medicine, Prague, Czech Republic
11. Service de Gastroentérologie et Hépatologie, Hôpital Desgenettes, Lyon, France
12. Hepatogastroenterology Unit, Second Department of Internal Medicine, Propaedeutic, Research Institute and Diabetes Center, Medical School, National and Kapodistrian University, Attikon University General Hospital, Athens, Greece
13. Department of Gastroenterology and Hepatology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
14. Gastroenterologie, Klinik Hirslanden, Zurich, Switzerland
15. Centre Hospitalier Universitaire de Nice, Pole D.A.R.E, Endoscopie Digestive, Nice, France
16. Department of Radiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
17. Department of Surgery, St. Antonius Hospital Nieuwegein, The Netherlands and Department of Surgical Oncology, University Medical Center Utrecht Cancer Center, The Netherlands
18. Department of Gastroenterology and Hepatology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands