1. Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky.
2. Department of Anatomy and Neurobiology, University of Kentucky, Lexington, Kentucky.
3. GLR Enterprises, L.L.C., Nicholasville, Kentucky.
4. Department of Mining Engineering, University of Kentucky, Lexington, Kentucky.
5. Department of Biostatistics, University of Kentucky, Lexington, Kentucky.
6. Department of Statistics, University of Kentucky, Lexington, Kentucky.