1. Department of Surgery, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
2. Department of Community Health Sciences, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
3. Department of Critical Care Medicine, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
4. Department of Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
5. Department of Clinical Neurosciences, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
6. Department of Hotchkiss Brain Institute, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
7. Department of Neurological Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota, University of Alberta, Edmonton, Alberta, Canada.
8. Department of Oncology, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
9. Department of Physiology and Pharmacology, University of Calgary and the Foothills Medical Centre, Calgary, Alberta, Canada.
10. Division of Critical Care Medicine, University of Alberta, Edmonton, Alberta, Canada.