1. Research Center for Infectious Diseases, Tianjin University of Traditional Chinese Medicine, 300193 Tianjin, China
2. Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC) and WHO Collaborating Center for Standardization and Evaluation of Biologicals, No.31 Huatuo Street, Daxing District, 102629 Beijing, China
3. College of Life Science, Jilin University, 130012 Changchun, China
4. Department of Neurology, Zhongshan Hospital (Xiamen Branch), Fudan University, 361015 Xiamen, Fujian China