1. Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, China
2. Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, China
3. Department of Infection Control, West China Hospital, Sichuan University, Chengdu, China
4. Institute of Microbiology and Infection, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
5. Center for Pathogen Research, West China Hospital, Sichuan University, Chengdu, China