1. Service of Gastroenterology and Hepatology, Geneva University Hospitals, Geneva, Switzerland
2. Department of Gastroenterology and Hepato-Pancreatology, Erasme University Hospital, Brussels, Belgium
3. Digestive Endoscopy Unit, Catholic University, Rome, Italy
4. Department of Gastroenterology and Hepatology, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain
5. Department of Gastroenterology and Hepatology, Erasmus Medical Center, Rotterdam, The Netherlands
6. Fribourg, Switzerland
7. Department of Gastroenterology, Centre Hospitalier de l'Université de Montréal, Montréal, Québec, Canada
8. Department of Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
9. Department of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, The Netherlands
10. Hôpital Edouard Herriot, Department of Digestive Diseases, Lyon, France