1. Sciences Po; Paris France
2. Department of Gastroenterology and Nutrition; Saint-Antoine Hospital, APHP; Paris
3. Department of Proctology; Croix Saint-Simon Hospital; Paris France
4. Department of General and Digestive Surgery; Saint-Antoine Hospital, APHP; Paris France
5. University Paris VI; Paris France
6. Center for Outcomes Research and Evaluation; Yale-New Haven Hospital; New Haven Connecticut USA
7. Senior Research Fellow at the National Centre for Scientific Research (CNRS); France
8. Section of General Internal Medicine and the Robert Wood Johnson Clinical Scholars Program, Department of Internal Medicine; Yale University School of Medicine
9. Department of Health Policy and Management; Yale University School of Public Health; New Haven Connecticut USA