1. From the Stroke Unit, Department of Neurology, CHU Lille, INSERM, U1171–Degenerative and Vascular Cognitive Disorders (M.F., D.L., C.C., H.H.)
2. Department of Neuroradiology, Lille University Hospital, France (N.B., L.E., T.P.).
3. Department of Biostatistics, CHRU Lille (M.K.), University of Lille, France