[1] Univ Toulouse 3, INSERM, UMR1027, Dept Epidemiol Econ Sante & Sante Publ, F-31062 Toulouse, France
[2] CHU Toulouse, Serv Epidemiol, Toulouse, France
[3] Univ Lille Nord France, INSERM, U744, Dept Epidemiol & Sante Publ,Inst Pasteur Lille, Lille, France
[4] Univ Strasbourg, Fac Med, EA 3430, Dept Epidemiol & Sante Publ, Strasbourg, France
[5] Hop Univ Strasbourg, Dept Sante Publ, Strasbourg, France
[6] CHU Toulouse, Hop Rangueil, Toulouse, France