1. Department of Neurosurgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
2. Department of Rheumatism, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
3. Department of Neurosurgery, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China
4. Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi 530021, P.R. China