1. Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
2. Anhui Key Laboratory of Tissue Transplantation, The First Affiliated Hospital, Bengbu Medical College, Bengbu, P.R. China
3. Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, USA