1. Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
2. Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary , Calgary, Alberta , Canada
3. Hotchkiss Brain Institute, University of Calgary , Calgary, Alberta , Canada
4. Alberta Health Services , Alberta , Canada
5. Division of Cardiology, Department of Medicine, McMaster University , Hamilton, Ontario , Canada
6. Département de Médecine, Université Laval , Quebec City, Quebec , Canada
7. Department of Critical Care Medicine, University of Alberta , Edmonton, Alberta , Canada
8. Division of Cardiology, Department of Medicine, University of Alberta , Edmonton, Alberta , Canada