1. Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, China
2. Department of Neurosurgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, China
3. Department of Pathology, Sanbo Brain Hospital, Capital Medical University, China
4. Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
5. Beijing Neurosurgical Institute, Beijing, China