1. Beijing Jingmei Group General Hospital, Department of Neurosurgery, Beijing, China.
2. Capital Medical University, Beijing Tian Tan Hospital, Department of Neurology, Beijing, China.
3. Beijing Jingmei Group General Hospital, Department of Emergency, Beijing, China.
4. Capital Medical University, Beijing Tiantan Hospital, Beijing Neurosurgical Institute, Department of Interventional Neuroradiology, Beijing, China.