1. Faculty of Dentistry University of Rennes, UMR 6051, CHU Rennes Rennes France
2. Ecole des Hautes Etudes en Santé Publique (EHESP), UMR 6051 Rennes France
3. Private Practice Rennes France
4. Faculty of Dentistry University of Rennes, LTSI, CHU Rennes Rennes France