1. From the Stroke Unit (M.H.-P., N.P.O., L.D., A.D.) and Diagnostic Imaging Institute (J.M.), Germans Trias i Pujol University Hospital, UAB, Badalona, Spain; and Department of Radiology, IDIBGI Diagnostic Imaging Institute, Dr Josep Trueta University Hospital, Girona, Spain (J.P., G.B.).