1 Microbiology Laboratory, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China; Respiratory Department, Shenzhen Children's Hospital, Shenzhen, China.
2 Pediatrics Department, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
4 CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: gaof@im.ac.cn.
5 Microbiology Laboratory, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China; Respiratory Department, Shenzhen Children's Hospital, Shenzhen, China. Electronic address: yyh628628@sina.com.