1. Division of Orthopaedics, McMaster University, Hamilton, Ontario, Canada.
2. Rick Hansen Institute, Vancouver, Canada.
3. University of British Columbia, Vancouver, Canada.
4. St. Michael's Hospital, Toronto, Ontario, Canada.
5. University of Toronto Spine Program, University of Toronto, Ontario, Canada.
6. Division of Orthopaedic Surgery, Western University; London Health Services Centre, London, Ontario, Canada.
7. Division of Neurosurgery–Halifax Infirmary, Dalhousie University, Halifax, Nova Scotia, Canada.
8. Department of Surgery, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
9. University of Calgary Spine Program, Calgary, Alberta, Canada.
10. Department of Physical Medicine and Rehabilitation, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
11. Division of Neurosurgery, University of Toronto, Ontario, Canada.