1. Department of Neurosurgery; Beijing Tiantan Hospital; Capital Medical University; Beijing China
2. Cell Therapy Center; Xuanwu Hospital; The Capital Medical University; Beijing China
3. Department of Neurosurgery; The Second Affiliated Hospital of Harbin Medical University; Harbin China
4. Department of Neurosurgery; Xuanwu Hospital; the Capital Medical University; Beijing China
5. Beijing Neurosurgical Institute; Beijing China