1. Department of Pediatrics, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.
2. Department of Pediatrics, Asthma and Allergy Center, Inje University Sanggye Paik Hospital, Seoul, Korea.
3. Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
4. Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.
5. Department of Pediatrics, Pusan National University Yangsan Hospital, Yangsan, Korea.
6. SCH Biomedical Informatics Research Unit, Soonchunhyang University Seoul Hospital, Seoul, Korea.
7. Department of Pediatrics, Dankook University Hospital, Cheonan, Korea.
8. Department of Pediatrics, Yonsei University Severance Hospital, Seoul, Korea.
9. Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi, Korea.
10. Department of Pediatrics, Inje University Haeundae Paik Hospital, Busan, Korea.
11. Department of Pediatrics, Korea University Guro Hospital, Seoul, Korea.
12. Department of Pediatrics, Eulji University Eulji General Hospital, Seoul, Korea.
13. Department of Pediatrics, Korea Cancer Center Hospital, Seoul, Korea.
14. Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
15. Department of Pediatrics, Hanyang University Guri Hospital, Guri, Korea.
16. Department of Pediatrics, Chonnam National University Hospital, Gwangju, Korea.
17. Department of Pediatrics, National Health Insurance Service, Ilsan Hospital, Ilsan, Korea.
18. Department of Pediatrics, Daegu Catholic University Medical Center, Daegu, Korea.
19. Department of Pediatrics, Chungnam National University Hospital, Daejeon, Korea.
20. Department of Pediatrics, Dongguk University Gyungju Hospital, Gyungju, Korea.
21. Department of Pediatrics, Sowha Children's Hospital, Seoul, Korea.
22. Department of Pediatrics, Seoul National University Children Hospital, Seoul, Korea.
23. Department of Pediatrics, CHA University CHA Bundang Medical Center, Seongnam, Korea.
24. Department of Pediatrics, Soonchunhyang University Seoul Hospital, Seoul, Korea.
25. Division of Pediatric Allergy & Pulmonology, Department of Pediatrics, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea.
26. Department of Pediatric Allergy & Pneumology, Catholic University Uijeongbu St. Mary's Hospital, Uijeongbu, Korea.