1. The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida.
2. The International Center for Spinal Cord Injury, Kennedy Krieger Institute and the Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
3. Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida.
4. Department of Anatomy and Cell Biology, University of Miami Miller School of Medicine, Miami, Florida.