1. Department of VIP Unit, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130022, China
2. Stroke Center and Department of Neurology, First Hospital of Jilin University, Changchun, Jilin 130022, China
3. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
4. University of Science and Technology of China, Hefei, Anhui 230026, China