1. Key Laboratory of Tropical Diseases Control (Sun Yat-sen University), Ministry of Education, Guangzhou, China
2. Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
3. Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
4. Health and Quarantine Institute, Guangzhou Customs Technology Centre, Guangzhou, China
5. Department of Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China