1. Department of Kinesiology, Health Promotion, and Recreation, University of North Texas, Denton, TX, USA
2. Amsterdam Rehabilitation Research Center, Reade, Amsterdam, Netherlands
3. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
4. Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL, USA
5. Miami Project to Cure Paralysis, Miami, FL, USA
6. Department of Physical Medicine and Rehabilitation, University of Alabama Birmingham, Birmingham, AL, USA