1. Department of Periodontology, Service of Odontology, Rothschild Hospital, Paris, France
2. U.F.R. of Odontology, Université de Paris, Paris, France
3. EA 2496 Laboratory Orofacial Pathologies, Imaging and Biotherapies, Faculty of Dental Surgery, Paris Descartes University, Montrouge, France
4. Microbiology UPRES-EA 1254, Université Européenne de Bretagne, Université of Rennes 1, Rennes, France
5. Inserm, Population-based Epidemiologic Cohorts Unit, Villejuif, France