1. Division of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Ontario, Canada.
2. Division of Neurosurgery and Spine Program, Department of Surgery, and University of Toronto, Toronto, Ontario, Canada.
3. University of Maryland School of Medicine, Baltimore, Maryland, USA.
4. Division of Neurosurgery, Walter Reed National Military Medical Center, Bethesda, Maryland, USA.
5. Kentucky Spinal Cord Injury Research Center, Louisville Kentucky, USA.
6. Neuroscience Institute. The Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
7. Department of Neurosurgery, Duke University, Durham North Carolina, USA.
8. The Miami Project to Cure Paralysis, University of Miami, Miami, Florida, USA.
9. Department of Neurosurgery, Houston Methodist Hospital, Houston Texas, USA.
10. Department of Neurological and Orthopedic Surgery, Division of Spine and Peripheral Nerve Surgery, and Delaware Valley SCI Center, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
11. Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada.