1. From the Division of Neurology, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Canada (H.K., P.R.)
2. School of Nursing, McMaster University, Hamilton, Canada (L.N.)
3. Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Interdepartmental Division of Critical Care Medicine, University of Toronto, Canada (M.G.C.)
4. Department of Clinical Neurosciences, Radiology, and Community Health Sciences, Cumming School of Medicine and the Hotchkiss Brain Institute, University of Calgary, Canada (B.K.M.).