1. Microbial Genome Research Center, CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3. Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada
4. Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310029, People's Republic of China
5. State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, People's Republic of China