1. Department of Neurological Surgery and the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine/Jackson Memorial Hospital, Miami, Florida
2. Department of Orth-opedic Surgery, SUNY Upstate Medical University, Syracuse, New York
3. Maine Medical Center Neuroscience Institute, Scarborough, Maine
4. Department of Orthopedic Surgery, Columbia University Medical Center, New York, New York