1. College of Biophotonics & School of Life Sciences, South China Normal University, Guangzhou 510631, P. R. China
2. Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
3. Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, P. R. China
4. Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510275, P. R. China