1. State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
2. State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
3. College of Life Science, University of Chinese Academy of Sciences, Beijing, China
4. Institute of Public Health, Nankai University, Tianjin, China