1. Department of Infectious Disease, Key Laboratory of Major Diseases in Children, Ministry of Education, Capital Medical University, National Center for Children's Health, Beijing Children's Hospital, Beijing, China
2. Research Unit of Critical Infection in Children, Chinese Academy of Medical Sciences, Beijing, China
3. Beijing Natural Science Foundation, Beijing, China
4. Respiratory Research Project of National Clinical Research Center for Respiratory Diseases, Beijing, China
5. Department of Ophthalmology, National Center for Children's Health, Capital Medical University, Beijing Children's Hospital, Beijing, China
6. Department of Otolaryngology, Head and Neck Surgery, National Center for Children's Health, Capital Medical University, Beijing Children's Hospital, Beijing, China