1. Vancouver Spine Surgery Institute (VSSI), Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada.
2. Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
3. International Collaboration on Repair Discoveries (ICORD), Department of Orthopaedics, Vancouver, British Columbia, Canada.
4. Population Health Research Institute and Department of Medicine, McMaster University, Hamilton, Ontario, Canada.