1. Department of Neurological Surgery, The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida.
2. Bruce W. Carter Department of Veterans Affairs Medical Center, Miami, Florida.
3. Department of Biochemistry, UT Southwestern Medical Center, Dallas, Texas.
4. Departments of Psychiatry and Neurology, University of Iowa Carver College of Medicine, Iowa City Department of Veterans Affairs, Iowa City, Iowa.