1. Department of Laboratory Medicine, Beijing Children's Hospital, Capital Medical University, Beijing, People's Republic of China.
2. Department of Infectious Disease, Beijing Children's Hospital, Capital Medical University, Beijing, People's Republic of China.
3. Key Laboratory of Major Diseases in Children and National Key Discipline of Pediatrics, Ministry of Education, National Clinical Research Centre for Respiratory Diseases, Beijing Key Laboratory of Pediatric Respiratory Infection Diseases, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, People's Republic of China.
4. Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, People's Republic of China.