1. Health-Economic Evaluation Unit, University Hospital Center of Tours, France
2. EA7505 Education, Ethics, Health, University of Tours, Tours, France
3. Gastroenterology Department, University Hospital Center of Tours, France
4. Gastroenterology Department, University Hospital Center of Bordeaux, France
5. Gastroenterology Department, University Hospital Center of Poitiers, France
6. Gastroenterology Department, Hospital Center of Blois, France
7. Gastroenterology Department, University Hospital Center of Rouen, France
8. Gastroenterology Department, University Hospital Center of Clermont-Ferrand, France
9. Gastroenterology Department, University Hospital Center of, Nantes, France
10. Gastroenterology Department, University Hospital Center of Angers, France
11. EA6296 VALLOREM, Loire Valley Management Research Unit, University of Tours, France