1. Faculty of Dentistry, CHU of Clermont-Ferrand, University of Auvergne; Dental Public Health; 11 Boulevard Charles de Gaulle Clermont-Ferrand France 63000
2. Hotel Dieu - CHU of Clermont-Ferrand, University of Auvergne; Public Health; Bd Leon Malfrey Clermont-Ferrand France 63003
3. CETAF; Quality - Evaluation - Etudes; 67-69 Avenue de Rochetaillée - BP 167 Saint-Etienne Cedex 02 France 42012
4. Faculty of Dentistry; Public Health; 545 Avenue du Professeur Jean Louis Viala Montpellier France 34193 Cedex 5
5. Institute of Social and Preventive Medicine; Health Care Evaluation Unit & Clinical Epidemiology Centre; Centre Hospitalier Vaudois and University of Lausanne Bugnon 17 Lausanne Switzerland Ch-1005
6. Witten/Herdecke University; Alfred-Herrhausen-Straße 50 Witten Germany 58448
7. Heidelberg University Dental School; Department of Conservative Dentistry; Univerität Heidelberg Im Neuenheimer Feld 400 Heidelberg Germany 69120
8. University of Lausanne; Center for Primary Care and Public Health; Biopôle 2 Route de la Corniche 10 Lausanne Switzerland 1010
9. Kornberg School of Dental Medicine, Temple University; 3223 North Broad Street Philadelphia Pennsylvania USA PA 19140 5007