1. Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
2. Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
3. O’Brien Institute for Public Health, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
4. Alberta Health Services, Calgary, Alberta, Canada
5. Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
6. Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
7. Department of Anesthesia and Interdisciplinary Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
8. Intensive Care National Audit & Research Centre (ICNARC), London, England
9. Department of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
10. Alberta Health Services, Edmonton, Alberta, Canada