From the Department of Neurology (J.M-F., P.C-R., A.R-P., M.G-J., A.M-D., D.G-A., L.P-S., L.P-S.), Neuroradiology Unit (B.M.G-A.), Department of Radiology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau, Barcelona, Spain; Department of Brain Repair and Rehabilitation (J.G.B., D.W., C.B., S.B., R.S., D.W.), UCL Stroke Research Centre, University College London Queen Square, Institute of Neurology, UK; Department of Statistical Science (G.A.), University College London, UK; Seoul National University College of Medicine Cerebrovascular Disease Center (K-J.L., H-J.B.); Department of Neurology (J-S.L.), Asan Medical Center University of Ulsan College of Medicine, South Korea; Department of Cerebrovascular Medicine (M.S., M.K., K.T.), National Cerebral and Cardiovascular Centre, Japan; Federation Universitätsmedizin Mannheim (M.G.H.), University of Heidelberg, Germany; Department of Neurology (H.C., E.J.), Translational Neurovascular Centre, Assistance Publique Hôpitaux de Paris, Lariboisière Hospital, France; Division of Neurology, Department of Medicine and Department of Diagnostic Radiology (D.Y.K.W., H.M., K.K.L.), The University of Hong Kong; Department of Neurology (Y.D.K., T-J.S., J-H.H.), Yonsei University College of Medicine, Seoul, South Korea; Department of Neurology (S.E., T.G.), Medical University of Graz, Austria; Department of Neurology (E.U., D.S.D.), Saglık Bilimleri University, Hamidiye Etfal Education and Research Hospital, Istanbul, Turkey; Department of Neurology (N.B., E.B.A., H.H., J.A.M.), Tel-Aviv Sourasky Medical Center, Israel; Department of Radiology and Division of Neurology, Department of Internal Medicine (M.N., J.T., H.H., Y.Y.), Saga University Faculty of Medicine, Japan; Calgary Stroke Program, Department of Clinical Neurosciences, Radiology and Community Health Sciences (S.B.C., E.S.), Hotchkiss Brain Institute, University of Calgary, Canada; Department of Neurology and Stroke Centre (A.A.P., B.W., D.S., P.A.L., N.P., S.T.E.), University Hospital Basel and University of Basel, Switzerland; Centre for Clinical Brain Sciences (R.A-S.S.), School of Clinical Sciences, University of Edinburgh; Lysholm Department of Neuroradiology and the Neuroradiological Academic Unit, Department of Brain Repair and Rehabilitation (H.R.J.), University College London Institute of Neurology and the National Hospital for Neurology and Neurosurgery; Liverpool Centre for Cardiovascular Science (G.Y.H.L.), University of Liverpool, UK; Department of Neurology (M.G., L.P., S.J.), Inselspital, Bern University Hospital and University of Bern, Switzerland; Peninsula Clinical School (C.C.K., T.G.P., V.K.S.), Peninsula Health and Stroke and Ageing Research Group, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia; Department of Neurology (N.C., S.G., F.F.), University Hospital of Würzburg, Germany; Department of Medicine and Therapeutics (T.W.L., Y.O.Y.S., W.C., J.A.), Prince of Wales Hospital, The Chinese University of Hong Kong; Univ Lille (A-M.M., R.B.), Inserm, CHU de Lille. Lille Neuroscience & Cognition, Paris, France; Memory Aging & Cognition Centre (S.H., B.G., C.C.), Yong Loo Lin School of Medicine, National University of Singapore; Department of Neurology (D.N.O.), Istanbul Arel University, Turkey.