1. Neuroscience Center, Department of Neurology, the First Hospital of Jilin University, Jilin University, Xinmin Street No. 71, Changchun 130021, China
2. Department of Neurovascular Surgery, the First Hospital of Jilin University, Jilin University, Xinmin Street No. 71, Changchun 130021, China
3. School of Public Health, Jilin University, Xinmin Street No. 1163, Changchun 130021, China
4. Neuroprotection Research Laboratory, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA