1. Endoscopy and Gastroenterology Unit, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
2. Endoscopy and Gastroenterology Unit, Hospital Saint Joseph, Paris, France
3. Department of Endoscopy and Gastroenterology, Dupuytren University Hospital, Limoges, France
4. Endoscopy and Gastroenterology Unit, Cochin University Hospital, Paris, France
5. Endoscopy and Gastroenterology Unit, Nancy University Hospital, Nancy, France
6. Department of Endoscopy and Gastroenterology, Hôpital Privé Jean Mermoz, Lyon, France
7. Endoscopy and Gastroenterology Unit, Vichy Hospital, Vichy, France
8. Endoscopy and Gastroenterology Unit, Dijon University Hospital, Dijon, France
9. Endoscopy and Gastroenterology Unit, Pontchaillou University Hospital, Rennes, France
10. Endoscopy and Gastroenterology Unit, Saint-Antoine University Hospital, Paris, France
11. Endoscopy and Gastroenterology Unit, Bordeaux University Hospital, Bordeaux, France
12. Endoscopy and Gastroenterology Unit, Saint Brieuc Hospital, Saint Brieuc, France
13. Endoscopy and Gastroenterology Unit, Georges Pompidou European Hospital, Paris, France
14. Department of Gastroenterology and Hepatology, University Hospital of Geneva (HUG), Geneva, Switzerland.
15. Digestive Diseases Institute, University Hospital Nantes, Nantes, France
16. Endoscopy and Gastroenterology Unit, Metz Hospital, Metz, France
17. Endoscopy and Gastroenterology Unit, Nîmes University Hospital, Nîmes, France
18. Endoscopy and Gastroenterology Unit, Nice University Hospital, Nice, France
19. Endoscopy and Gastroenterology Unit, Besançon University Hospital, Besançon, France
20. Biostatistics Unit, Hospices Civils de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS, and Laboratoire de Biométrie et Biologie Évolutive, Lyon, France