1. Kentucky Spinal Cord Injury Research Center (KSCIRC), Louisville, Kentucky.
2. Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky.
3. Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky.
4. M.D./Ph.D. Program, University of Louisville School of Medicine, James Graham Brown Cancer Center, Louisville, Kentucky.