1. Beijing Children's Hospital Capital Medical University Beijing China
2. National Clinical Research Center for Respiratory Diseases Beijing China
3. Shenzhen Children's Hospital Shenzhen Guangzhou China
4. The first affiliated hospital of Xiamen University Xiamen Fujian China
5. Children's Hospital of Fudan University Shanghai China
6. The 2nd Affiliated Hospital and Yuying Children's Hospital of WMU Wenzhou Zhejiang China
7. Capital Institute of Pediatrics Children's Hospital Beijing China
8. Shanghai Children's Medical Center Shanghai China
9. The First Affiliated Hospital of Guangxi Medical University Nanning Guangxi China
10. Children's Hospital of Chongqing Medical University Chongqing China
11. Tianjin Children's Hospital Tianjin China
12. Jiangxi Provincial Children's Hospital Nanchang Jiangxi China
13. The Affiliated Hospital of Guizhou Medical University Guiyang Guizhou China