1. From the Departments of Clinical Neurosciences (I.D., J.H.W.P., P.A.B., A.M.D., M.D.H.), Calgary Stroke Program, and the Department of Medicine (M.D.H.), Department of Community Health Science, University of Calgary, Calgary, Canada; the Department of Gerontology (A.M.B.), University of Oxford, Oxford, England; and the Department of Neurology (I.D.), University of Dresden, Dresden, Germany.