1. Department of Psychiatry, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Childhood Asthma Atopy Center, Department of Pediatrics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Pediatrics, Kosin University Gospel Hospital, Kosin University College of Medicine, Busan, Korea.
4. Department of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Department of Pediatrics, Hae-undae Paik Hospital, Inje University College of Medicine, Busan, Korea.
6. Department of Pediatrics, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
7. Department of Pediatrics, Hallym University Sacred Heart Hospital, Anyang, Korea.
8. Department of Pediatrics, National Health Insurance Corporation Ilsan Hospital, Ilsan, Korea.
9. Department of Pediatrics, Korea University Guro Hospital, Seoul, Korea.
10. Department of Pediatrics, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea.
11. Department of Pediatrics, Kangbuk Samsung Hospital, Sunkyunkwan University College of Medicine, Seoul, Korea.
12. Asan Institute for Life Sciences, University of Ulsan College of Medicine, Seoul, Korea.
13. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
14. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
15. Center for Immunology & Pathology, Korea National Institute of Health, Chungcheongbuk-do, Korea.