1. Department of Pediatrics Seoul National University College of Medicine Seoul South Korea
2. Department of Pediatrics Korea University College of Medicine Seoul South Korea
3. Department of Pediatrics Hallym University Kangdong Sacred Heart Hospital Seoul South Korea
4. Department of Pediatrics Soonchunhyang University School of Medicine Bucheon South Korea
5. Department of Pediatrics Korea University Anam Hospital Seoul South Korea
6. Department of Pediatrics Seoul National University Bundang Hospital Seongnam South Korea
7. Department of Pediatrics National Health Insurance Service Ilsan Hospital Ilsan South Korea
8. Department of Pediatrics Pediatric Allergy and Respiratory Center Soonchunhyang University College of Medicine Seoul South Korea
9. Department of Pediatrics Chonnam National University Hospital Chonnam National University Medical School Gwangju South Korea
10. Department of Pediatrics School of Medicine Bucheon St. Mary's Hospital The Catholic University of Korea Bucheon South Korea
11. Department of Pediatrics Dankook University Hospital Cheonan South Korea
12. Department of Pediatrics College of Medicine Chungbuk National University Cheongju South Korea
13. Department of Pediatrics Pusan National University Yangsan Hospital Yangsan South Korea
14. Department of Pediatrics Gangnam CHA Medical Center CHA University School of Medicine Seoul South Korea
15. Department of Pediatrics Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
16. Department of Pediatrics College of Medicine Chung‐Ang University Seoul South Korea
17. Department of Pediatrics Pusan National University Children’s Hospital Pusan National University School of Medicine Yangsan South Korea
18. Department of Clinical Epidemiology and Biostatistics Asan Medical Center Seoul South Korea
19. Asan Institute for Life Sciences University of Ulsan College of Medicine Seoul South Korea
20. Department of Pediatrics Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
21. Department of Pediatrics Inje University Seoul Paik Hospital Seoul South Korea
22. Department of Pediatrics School of Medicine Inha University Incheon South Korea
23. Department of Pediatrics School of Medicine Uijeongbu St. Mary's Hospital The Catholic University of Korea Uijeongbu South Korea