1. Department of Family Medicine, Northern Ontario School of Medicine, Timmins and District Hospital, Timmins, Canada.
2. Department of Critical Care Medicine and Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Canada.
3. Department of Critical Care Medicine, Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, Canada.
4. Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, Canada.