1. Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
2. China National Clinical Research Centre for Neurological Diseases, Beijing, China
3. Department of Neurosurgery, Beijing Jingmei Group General Hospital, Beijing, China
4. Department of Neurosurgery, Yutian County Hospital, Tangshan, China
5. Department of Neurosurgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
6. Department of Interventional Neuroradiology, Beijing Neurosurgical Institute, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
7. Center of Stroke, Beijing Institute for Brain Disorders, Beijing, China