1 Division of Critical Care, Department of Medicine, Schulich School of Medicine and Dentistry, Western University and Lawson Health Research Institute, London, ON, Canada. cmartin1@uwo.ca.
2 London Health Sciences Centre - Victoria Hospital, 800 Commissioners Rd E, London, ON, N6A 5W9, Canada. cmartin1@uwo.ca.
3 Trauma Program, Department of Surgery, London Health Sciences Centre, London, ON, Canada.