1. Department of Neurosurgery, University of Cambridge, Cambridge, United Kingdom
2. , International Charity for Degenerative Cervical Myelopathy, United Kingdom
3. Goffin Consultancy, Canterbury, United Kingdom
4. KITE Research Institute, University Health Network, Toronto, Ontario, Canada
5. Division of Physical Medicine and Rehabilitation, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
6. Department of Clinical Neurosciences, Edinburgh, United Kingdom
7. Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada
8. Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
9. Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, USA
10. Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA
11. Department of Neurosurgery, Medical College of Wisconsin, Wauwatosa, WI, USA
12. Department of Neurosurgery and The Miami Project to Cure Paralysis, The Miller School of Medicine, University of Miami, Miami, FL, USA
13. Department of Orthopedics, Vancouver Spine Surgery Institute, The University of British Columbia, Vancouver, British Columbia, Canada
14. Department of Orthopaedic Surgery, Rothman Orthopaedic Institute, Thomas Jefferson University, Philadelphia, PA, USA
15. Department of Neurosurgery, Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran