1. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Pharmacovigilance Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
3. Department of Pulmonary, Allergy and Critical Care Medicine, Seongnam Citizens Medical Center, Seongnam, Korea.
4. Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
5. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea.
6. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Armed Forces Capital Hospital, Seongnam, Korea.
7. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.