1. Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
2. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Pediatrics, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea.
4. Department of Pediatrics, Soonchunhyang University Hospital, Seoul, Korea.
5. Department of Pediatrics, Severance Hospital, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Pediatrics, National Health Insurance Corporation Ilsan Hospital, Goyang, Korea.
7. Department of Pediatrics, Inje University Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
8. Department of Pediatrics, Inha University Hospital, Incheon, Korea.
9. Department of Pediatrics, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
10. Department of Pediatrics, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
11. Department of Pediatrics, Konkuk University School of Medicine, Seoul, Korea.
12. Department of Pediatrics, Atopy Clinic, Seoul Medical Center, Seoul, Korea.
13. Department of Pediatrics, The Catholic University of Korea, Uijeongbu St. Mary's Hospital, The Catholic University of Korea College of Medicine, Uijeongbu, Korea.
14. Department of Pediatrics, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.