1. Department of Anatomy and Cell Biology & Department of Neurological Surgery, Spinal Cord and Brain Injury Research Group, Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana.
2. Department of Spinal Surgery and Orthopedics, The First Affiliated Hospital of Anhui Medical University, Hefei, China.
3. Research Center of Neurobiology, Shanxi University of Traditional Chinese Medicine, Taiyuan, China.