1. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
2. Department of Pulmonology, Allergy and Critical Care Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
3. Division of Allergy, Asthma, and Clinical Immunology, Department of Internal Medicine, Chonnam National University Medical School & Chonnam National University Hospital, Gwangju, Korea.
4. Division of Allergy, Department of Internal Medicine, College of Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
5. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea.
6. Department of Internal Medicine, Seoul Metropolitan Government - Seoul National University Boramae Medical Center, Seoul, Korea.
7. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
8. Division of Respiratory Medicine and Allergy, Department of Internal Medicine, Jeonbuk National University Medical School, Jeonju, Korea.
9. Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
10. Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
11. Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea.
12. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
13. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
14. Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.