1. CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, People's Republic of China.
2. Graduate University of Chinese Academy of Sciences, Beijing, People's Republic of China.
3. Institute of Poultry Science, Shandong Academy of Agricultural Sciences, Jinan, People's Republic of China.
4. China-Japan Joint Laboratory of Molecular Immunology and Molecular Microbiology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, People's Republic of China.