From the Division of Brain Sciences (E.K., A.D.G., R.V.), Department of Stroke Medicine, and Department of Primary Care and Public Health (F.T.F.), Imperial College, London, UK; Aalborg Thrombosis Research Unit (P.B.N., G.Y.H.L.), Department of Clinical Medicine, Faculty of Medicine, Aalborg University, Denmark; Institute of Cardiovascular Sciences (G.Y.H.L.), University of Birmingham, UK; Department of Neurology (J.B.K., H.B.H.), University of Erlangen-Nuremberg, Erlangen, Germany; Institute for Clinical Evaluative Sciences (J.F.), Toronto; Thrombosis and Atherosclerosis Research Institute (S.S.), Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Stroke Unit (J.M.-F.), Department of Neurology, Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain; Department of Neurology and Neurosurgery (C.S.G.), Brain Center Rudolf Magnus, University Medical Center Utrecht, the Netherlands; Department of Neurology (A.V., A.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Thrombosis Center (D.P.), Careggi Hospital, Florence, Italy; Department of Neurology (C.W.), University Hospital of Duisburg-Essen, Essen; Clinical Trial Center Würzburg (U.M., P.H.), University Hospital Würzburg; and Institute of Clinical Epidemiology and Biometry (P.H.), Comprehensive Heart Failure Center, University Würzburg, Germany. From the Division of Brain Sciences (E.K., A.D.G., R.V.), Department of Stroke Medicine, and Department of Primary Care and Public Health (F.T.F.), Imperial College, London, UK; Aalborg Thrombosis Research Unit (P.B.N., G.Y.H.L.), Department of Clinical Medicine, Faculty of Medicine, Aalborg University, Denmark; Institute of Cardiovascular Sciences (G.Y.H.L.), University of Birmingham, UK; Department of Neurology (J.B.K., H.B.H.), University of Erlangen-Nuremberg, Erlangen, Germany; Institute for Clinical Evaluative Sciences (J.F.), Toronto; Thrombosis and Atherosclerosis Research Institute (S.S.), Department of Medicine, McMaster University, Hamilton, Ontario, Canada; Stroke Unit (J.M.-F.), Department of Neurology, Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain; Department of Neurology and Neurosurgery (C.S.G.), Brain Center Rudolf Magnus, University Medical Center Utrecht, the Netherlands; Department of Neurology (A.V., A.B.), Massachusetts General Hospital, Harvard Medical School, Boston; Thrombosis Center (D.P.), Careggi Hospital, Florence, Italy; Department of Neurology (C.W.), University Hospital of Duisburg-Essen, Essen; Clinical Trial Center Würzburg (U.M., P.H.), University Hospital Würzburg; and Institute of Clinical Epidemiology and Biometry (P.H.), Comprehensive Heart Failure Center, University Würzburg, Germany. r.veltkamp@imperial.ac.uk.