1. Department of Pediatrics, Korea University College of Medicine and Environmental Health Center for Childhood Asthma, Korea University Anam Hospital, Seoul, Korea.
2. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
4. Department of Internal Medicine, St. Carollo General Hospital, Suncheon, Korea.
5. Department of Pulmonology, Allergy and Critical Care Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
6. Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea.
7. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
9. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
10. Department of Family Medicine, Seoul National University Hospital, Seoul, Korea.
11. Department of Otorhinolaryngology, Gachon University, Gil Medical center, Incheon, Korea.
12. Department of Internal Medicine, Seoul National University Bundang Hospital, Bundang, Korea.
13. Department of Pediatrics, Kangwon National University School of Medicine, Chuncheon, Korea.
14. Department of Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea.
15. Institute for Evidence-based Medicine Cochrane Korea, Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea.
16. Department of Pediatrics, Inje University Sanggye Paik Hospital, Seoul, Korea.
17. Division of Allergy and Immunology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
18. Woori Pediatric Clinic, Goyang, Korea.
19. Department of Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea.
20. Respiratory and Allergy Clinic, Pusan National University Yangsan Hospital, Yangsan, Korea.
21. GF Internal Medicine Allergy Clinic, Seoul, Korea.
22. Department of Pediatrics, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.
23. Department of Internal Medicine, Armed Forces Capital Hospital, Seongnam, Korea.
24. Department of Pediatrics, Hallym University Dongtan Sacred Heart Hospital, Dongtan, Korea.
25. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea.
26. Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea.
27. Department of Internal medicine, Yeungnam University College of Medicine, Daegu, Korea.
28. Department of Pediatrics, Kyung Hee University School of Medicine, Seoul, Korea.
29. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
30. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
31. Department of Internal Medicine, Eulji Hospital, Eulji University School of Medicine, Seoul, Korea.
32. Department of Pediatrics, Inha University School of Medicine and Environmental Health Center for Allergic Disease, Inha University Hospital, Incheon, Korea.