Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China;
Bacteriology Laboratory, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China;
Pediatric Intensive Care Unit, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China;
Ministry of Education Key Laboratory of Major Diseases in Children, National Key Discipline of Pediatrics (Capital Medical University), National Clinical Research Center for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China;
Bacteriology Laboratory, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China;
