1. Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China;
2. Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China;
3. Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Chinese Ministry of Education, Guangzhou, China; and
4. Translational Tumor Immunology, The Wistar Institute, Philadelphia, PA