1. Department of Pediatrics, Pediatric Allergy and Respiratory Center, Soonchunhyang University College of Medicine, Seoul, Korea.
2. SCH Biomedical Informatics Research Unit, Soonchunhyang University Hospital, Seoul, Korea.
3. Department of Otorhinolaryngology, Inha University College of Medicine, Incheon, Korea.
4. Department of Biostatistic Consulting, Clinical Trial Center, Soonchunhyang Medical Center, Bucheon, Korea.
5. MBL Children's Hospital, Daejeon, Korea.
6. Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University Chuncheon Sacred Heart Hospital and Nano-Bio Regenerative Medical Institute, Hallym University College of Medicine, Chuncheon, Korea.
7. Department of Pulmonology, Allergy and Critical Care Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
8. Department of Pediatrics, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea.
9. Wooridul Private Internal Clinic, Gwangju, Korea.
10. Department of Pediatrics, Inha University Hospital, Inha University College of Medicine, Incheon, Korea.
11. Department of Pediatrics, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea.
12. A & A Clinic, Seongnam, Korea.
13. Department of Otorhinolaryngology, Head and Neck Surgery, Dong-A University College of Medicine, Busan, Korea.
14. Department of Otorhinolaryngology-Head & Neck Surgery, Catholic Kwandong Universtiy, International St. Mary's Hospital, Incheon, Korea.
15. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea.
16. Division of Pulmonology and Allergy, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea.
17. GF Internal Medicine Allergy Clinic, Seoul, Korea.
18. Lee & Hong ENT, Sleep and Cosmetic Center, Seongnam, Korea.
19. Cho & Park ENT Clinics, Suwon, Korea.
20. Derpartment of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
21. Department of Pulmonology and Allergy, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea.
22. Department of Pediatrics, Korea University Anam Hospital, Seoul, Korea.
23. Allergy Immunology Center, Korea University, Seoul, Korea.
24. Department of Internal Medicine, Chonnam National University Medical School & Hospital, Gwangju, Korea.