[1] Hop La Pitie Salpetriere, INSERM, Neuroepidemiol U708, F-75651 Paris 13, France
[2] Univ Paris 06, Fac Med, Paris, France
[3] Harvard Univ, Brigham & Womens Hosp, Dept Med, Div Prevent Med,Med Sch, Boston, MA 02115 USA
[4] Harvard Univ, Sch Publ Hlth, Dept Epidemiol, Boston, MA 02115 USA
[5] Hop Lariboisiere, APHP, Stroke Unit, Dept Neurol, F-75475 Paris, France