1. 1 Collaboration for Outcomes Research and Evaluation (CORE), Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
2. 2 Human Sciences Division, Northern Ontario School of Medicine, Sudbury, Ontario, Canada
3. 3 International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, British Columbia, Canada
4. 4 Praxis Spinal Cord Institute, Vancouver, British Columbia, Canada
5. 5 Department of Orthopaedics, University of British Columbia, Vancouver, British Columbia, Canada
6. 6 Department of Neurology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
7. 7 Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania