1. Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea.
2. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.
3. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
4. Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
5. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Pediatrics, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
7. Department of Allergy and Clinical Immunology, Chonnam National University Hospital, Chonnam National University Medical School, Gwangju, Korea.
8. Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul, Korea.
9. Division of Allergy and Immunology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
10. Division of Allergy, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
11. Department of Internal Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea.
12. Department of Dermatology, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Korea.
13. Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
14. Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea.