1. Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
2. Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China
3. Department of China-America Institute of Neuroscience, Xuanwu Hospital, Capital Medical University, Beijing, China
4. National Clinical Research Center for Geriatric Disorders, Beijing, China
5. Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China