1. Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, USA
2. Department of Physical Therapy, Marquette University, Milwaukee, WI, USA
3. KITE Research Institute, University Health Network, Toronto, ON, Canada
4. Division of Physical Medicine and Rehabilitation, Department of Medicine, University of Toronto, Toronto, ON, Canada
5. University Spine Center, Balgrist University Hospital, Zurich, Switzerland
6. Department of Orthopedics, Vancouver Spine Surgery Institute, The University of British Columbia, Vancouver, BC, Canada
7. Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
8. Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, USA
9. Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA
10. Department of Neurosurgery, Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
11. Department of Neurosurgery and The Miami Project to Cure Paralysis, The Miller School of Medicine, University of Miami, Miami, FL, USA
12. Department of Neurosurgery, University of Cambridge, Cambridge, UK
13. Department of Orthopaedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China