1. Division of Physical Medicine and Rehabilitation, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada;
2. Amsterdam Rehabilitation Research Center, Reade, Amsterdam, Netherlands;
3. Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, Groningen, Netherlands;
4. Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA;
5. Miami Project to Cure Paralysis, Miami, FL, USA