1. Department of Pediatrics, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, China
2. National Children's Medical Center, Shanghai Children's Medical Center Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
3. Department of Pediatrics, Shanghai EverBetter Pubin Children's Hospital, Shanghai, China
4. Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Institute of Respiratory Disease, Guangzhou, China
5. Department of Pediatrics, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
6. Department of Allergy, Beijing Children's Hospital, Capital Medical University, Beijing, China
7. Department of Pediatrics, Capital Institute of Pediatrics, Beijing, China
8. Department of Respiratory Diseases, the Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
9. Department of Respiratory Diseases, Children's Hospital of Nanjing Medical University, Nanjing, China
10. Department of Respiratory Diseases, Children's Hospital of Chongqing Medical University, Chongqing, China
11. Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, China