1. Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
2. Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
3. Graduate School, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100730, China
4. NHC Key Laboratory of Medical Immunology, Peking University, Beijing 100191, China