1 Department of Neurology (N.M., V.G., J.L.M.) and Department of Neuroradiology (C.O.), Université Paris-Descartes, Sorbonne Paris Cité, INSERM UMR 894, Centre Hospitalier Sainte-Anne, Paris, France; Department of Neurology (P.L.), CHU Montpellier, Hôpital Gui de Chauliac, Montpellier, France; and Department of Neurology (G.T.), CHU Nîmes, Hôpital Caremeau, Nîmes, France.