1. Cumming School of Medicine, University of Calgary, Foothills Medical Centre, 3330 Hospital Dr NW, Calgary, AB, Canada T2N 4N1
2. Department of Critical Care Medicine, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, Canada T2N 4N1
3. Departments of Surgery and Anaesthesia, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB, Canada T2N 4N1