1. From Department of Neurology (A.V., M.-G.B., H.C.) and Neuropathology (F.G., M.B.), Assistance Publique-Hôpitaux de Paris (AP-HP) Hôpital Lariboisière-Université Paris VII, Paris, France; Department of Neurology and Clinical Trials Unit (A.V.), Massachusetts General Hospital and Harvard Medical School, Boston, Mass.