1. Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.
2. Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana.
3. Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, Indiana.
4. Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana.
5. Goodman Campbell Brain and Spine, Indiana University School of Medicine, Indianapolis, Indiana.