1. Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou 221002, P. R. China
2. Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, P. R. China
3. Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
4. Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou 221002, P. R. China
5. Department of Neurosurgery, The Third Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, P. R. China