1. Gastroenterology Department, University Hospital of Brest, Brest, France
2. LaTIM, UMR 1101, Brest University Hospital, Brest, France
3. Department of Endoscopy and Gastroenterology, Centre Hospitalier Universitaire Pontchaillou, Rennes, France
4. Department of Endoscopy and Hepatogastroenterology, Pavillon L, Edouard Herriot Hospital, Lyon, France
5. Department of Endoscopy and Gastroenterology, Centre Hospitalier Universitaire Dupuytren, Limoges, France