1. Department of PediatricsSeoul National University Hospital, Seoul National University College of MedicineSeoul South Korea
2. Department of Pediatrics, Childhood Asthma Atopy Center, Environmental Health Center, Asan Medical CenterUniversity of Ulsan College of MedicineSeoul South Korea
3. Department of PediatricsHallym University Sacred Heart HospitalAnyang South Korea
4. Department of PediatricsSeoul National University Bundang HospitalSeongnam South Korea
5. Department of PediatricsNational Health Insurance Service Ilsan HospitalGoyang South Korea
6. Department of PediatricsGachon University Gil Medical CenterIncheon South Korea
7. Department of Pediatrics, College of MedicineChungbuk National UniversityCheongju South Korea
8. Department of Pediatrics, College of MedicineThe Catholic University of KoreaDaejeon South Korea
9. Department of PediatricsPresbyterian Medical CenterJeonju South Korea
10. Department of PediatricsChonnam National University Hospital, Chonnam National University Medical SchoolGwangju South Korea
11. Department of PediatricsGwangju Veterans HospitalGwangju South Korea
12. Department of PediatricsCatholic University of Daegu School of MedicineDaegu South Korea
13. Department of PediatricsUlsan University HospitalUlsan South Korea
14. Department of PediatricsPusan National University Yangsan HospitalYangsan South Korea
15. Departments of Pediatrics and Anatomy, College of MedicineDong‐A UniversityBusan South Korea
16. Department of PediatricsGyeongsang National University College of MedicineJinju South Korea