[1] CHU Montpellier, Dept Psychiat, F-34000 Montpellier, France
[2] CHU Montpellier, Ctr Ressources Autisme Languedoc Roussillon, 39 Ave Charles Flahaut, F-34295 Montpellier, France
[3] INSERM, U1178, Ctr Rech Epidemiol & Sante Populat, Paris, France
[4] Univ Montpellier, Ecole Med, Montpellier, France
[5] Harvard Med Sch, Boston Childrens Hosp, Dev Med Ctr, Boston, MA 02115 USA