1. Division of Spine, Department of Orthopedics, University of British Columbia, Vancouver, British Columbia, Canada.
2. University of British Columbia, Vancouver, British Columbia, Canada.
3. Rick Hansen Institute, Vancouver, British Columbia, Canada.
4. Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
5. St. Michael's Hospital, University of Toronto Spine Program, Toronto, Ontario, Canada.
6. Hôpital Enfant-Jésus, Laval University, Quebec City, Quebec, Canada.
7. The Ottawa Hospital, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada.
8. Horizon Health Network/Dalhousie University, Saint John, New Brunswick, Canada.
9. Saint John Regional Hospital, Saint John, New Brunswick, Canada.
10. Western University, London, Ontario, Canada.
11. Dalhousie University, Halifax, Nova Scotia, Canada.
12. Hamilton General, Hamilton, Ontario, Canada; McMaster University, Hamilton, Ontario, Canada.
13. University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
14. Royal Alexandra Hospital, Edmonton, Alberta, Canada.
15. University of Calgary Spine Program, Calgary, Alberta, Canada.
16. Department of Surgery, Orthopaedics and Neurosurgery, University of Manitoba, Winnipeg, Manitoba, Canada.
17. Department of Physical Medicine and Rehabilitation, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
18. Hôpital du Sacré-Coeur de Montréal, Hôpital Ste-Justine, Montréal, Quebec, Canada; Université de Montréal, Montréal, Quebec, Canada.
19. Division of Neurosurgery and Spinal Program, University of Toronto, Toronto, Ontario, Canada.