1. From the University of Toronto (T.A.-K.), Toronto, Ontario, Canada; the Division of Neurosurgery (R.L.M., T.A.S.), St Michael’s Hospital, Toronto, Ontario, Canada; the Division of Neurosurgery (R.L.M., T.A.S.), Department of Surgery, University of Toronto, Toronto, Ontario, Canada; the Keenan Research Centre of the Li Ka Shing Knowledge Institute at St Michael’s Hospital (R.L.M., T.A.S.), Toronto, Ontario, Canada; and the Heart and Stroke Foundation–Centre for Stroke Recovery (T.A.S.), Ontario, Canada.