1. Department of Neurosurgery, Clinical Medicine College, Affiliated Hospital of Hebei University, Hebei University, Baoding, Hebei 071000, P.R. China
2. Department of Neurological Examination, Affiliated Hospital of Hebei University, Hebei University, Baoding, Hebei 071000, P.R. China
3. Department of Pathology, Affiliated Hospital of Hebei University, Hebei University, Baoding, Hebei 071000, P.R. China
4. Department of Oncology, Affiliated Hospital of Hebei University, Hebei University, Baoding, Hebei 071000, P.R. China