1. From INSERM Unit 708-Neuroepidemiology (T.K.) and Pierre et Marie Curie University (T.K.), Paris, France; the Division of Preventive Medicine (T.K.), Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Mass; and Service de Neurologie (M.G.B.), Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris, and Diderot University (M.G.B.), Paris, France.