1. Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
2. China National Clinical Research Center for Neurological Diseases, Beijing, China
3. Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China
4. Department of Neurosurgery, Weifang Yidu Central Hospital, 4138 Linglongshan Road, Qingzhou, Shandong Province, 262500, China