1 Neurology Division (M.M.S., L.H.C., R.N., A.A.Z., L.G.S., G.C.R.F., H.R.S.N.) and Radiology Institute (L.L.), Hospital das Clínicas, São Paulo University, São Paulo, Brazil; August Pi i Sunyer Biomedical Research Institute (IDIBAPS) (M.P.-P., J.O.D.), Barcelona, Spain; Department of Neurology (J.O.D.), University of Pennsylvania, Philadelphia, PA; and Catalan Institution for Research and Advanced Studies (ICREA) (J.O.D.), Barcelona, Spain.