1. Division of Neurosurgery, Dalhousie University, Halifax, Nova Scotia, Canada.
2. Rick Hansen Institute, Vancouver, British Columbia, Canada.
3. Western University, London, Ontario, Canada.
4. The Ottawa Hospital, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada.
5. Hamilton General, McMaster University, Hamilton, Ontario, Canada.
6. University of British Columbia, Vancouver, British Columbia, Canada.
7. Division of Neurosurgery and Spinal Program, University of Toronto, Toronto, Ontario, Canada.
8. Blusson Spinal Cord Centre, Vancouver, British Columbia, Canada.