1. Department of Dermatology, Institute of Human-Environment Interface Biology, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Pediatrics, Wonkwang University Sanbon Hospital, Wonkwang University School of Medicine, Gunpo, Korea.
4. Department of Pediatrics, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea.
5. Department of Pediatrics, Incheon Medical Center, Incheon, Korea.
6. Department of Pediatrics, University of Ulsan College of Medicine, Seoul, Korea.
7. Department of Pediatrics, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea.
8. Department of Pediatrics, Soonchunhyang University Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan, Korea.
9. Department of Allergy and Rheumatology, Ajou University School of Medicine, Suwon, Korea.
10. Department of Pediatrics, Seoul Medical Center, Seoul, Korea.