1. Beijing Neurosurgical Institute, Capital Medical University, Beijing 100070, P.R. China
2. Beijing Neurosurgical Institute, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing Institute for Brain Disorders Brain Tumor Center, China National Clinical Research Center for Neurological Diseases, Key Laboratory of Central Nervous System Injury Research, Beijing 100070, P.R. China
3. Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing Neurosurgical Institute, Beijing 100070, P.R. China