1. Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
2. Department of Emergency, Xuanwu Hospital, Capital Medical University, Beijing, China
3. Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
4. Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
5. Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, USA
6. Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China