1. Hotchkiss Brain Institute and the Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
2. Department of Anesthesia, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada.
3. KY Spinal Injury Research Center, University of Louisville, Louisville, Kentucky.
4. Department of Neuroscience and Trauma, Blizard Institute, Queen Mary University of London, London, United Kingdom.
5. Division of Neurosurgery, University of Arizona, Tucson, Arizona.