1. Department of Pediatrics, Soonchunhyang University College of Medicine, Choenan, Korea.
2. Department of Pediatrics, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Pediatrics, Inje University College of Medicine, Busan, Korea.
4. Department of Pediatrics, Konkuk University School of Medicine, Seoul, Korea.
5. Medical Informatics & Epidemiology, Biostatistics, Soonchunhyang University, Cheonan, Korea.
6. Atopy Clinic, Seoul Medical Center, Seoul, Korea.
7. Department of Pediatrics, Hallym University College of Medicine, Chuncheon, Korea.
8. Department of Health Policy and Management, Seoul National University School of Public Health, Seoul, Korea.