1. Gastroenterology and Endoscopy Unit, Pavilion L, Edouard Herriot Hospital, Lyon, France
2. Inserm U1032, Labtau, Lyon, France
3. Department of Gastroenterology, Pontchaillou University Hospital, Rennes, France
4. Gastroenterology and Endoscopy Unit, Dupuytren university Hospital, Limoges, France
5. Clinique Claude Bernard, Albi, France