1. Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
2. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
3. Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Pulmonology and Allergy, Hallym University College of Medicine, Chuncheon, Korea.
5. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
6. Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
7. Division of Pulmonology and Allergy, Konyang University College of Medicine, Daejeon, Korea.
8. Division of Pulmonology and Allergy, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea.
9. Department of Pediatrics, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea.
10. Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.