1. From the Stroke Outcomes Research Unit (G.S.), Division of Neurology, Department of Medicine, and Li Ka Shing Knowledge Institute (G.S., M.M.), St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada; the Institute for Clinical Evaluative Sciences (ICES; G.S., J.F., M.K.K., J.V.T., M.M., P.A.), Ontario. Canada.; the Division of General Internal Medicine and Clinical Epidemiology (M.K.K.), Department of Medicine, University Health Network, Toronto, Ontario, Canada, and the University...