1. Departments of Anaesthesia and Surgery, University of Toronto, Toronto, Canada and The Cara Phelan Centre for Trauma Research, St. Michael's Hospital, Toronto, Canada
2. Department of Surgery, University of Toronto, Toronto, Canada and The Cara Phelan Centre for Trauma Research, St. Michael's Hospital, Toronto, Canada
3. Department of Surgery, University of Toronto, Toronto, Canada
4. Departments of Ophthalmology and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada and The Cara Phelan Centre for Trauma Research, St. Michael's Hospital, Toronto, Canada
5. Department of Anaesthesia, University of Toronto, Toronto, Canada and The Cara Phelan Centre for Trauma Research, St. Michael's Hospital, Toronto, Canada