1 Chinese Academy of Sciences Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.
2 Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China.
3 Chinese Academy of Sciences Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China. liucuihua@im.ac.cn.
4 Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China. liucuihua@im.ac.cn.