1. Division of Neurosurgery, Department of Surgery, Vancouver Spine Surgery Institute, University of British Columbia, Blusson Spinal Cord Centre, Vancouver, British Columbia, Canada.
2. Vancouver Spine Program, Vancouver General Hospital, Vancouver, British Columbia, Canada.
3. Department of Orthopaedics, Vancouver Spine Surgery Institute, University of British Columbia, Blusson Spinal Cord Centre, Vancouver, British Columbia, Canada.
4. International Collaboration on Repair Discoveries (ICORD) Blusson Spinal Cord Centre, Vancouver, British Columbia, Canada.