1. Department of Allergy and Clinical Immunology, 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 Internal Medicine, Pusan National University School of Medicine, Busan, Korea.
4. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
5. Department of Allergy and Respiratory Medicine, Konkuk University Medical Center, Seoul, Korea.
6. Department of Internal Medicine, VHS Medical Center, Seoul, Korea.
7. Department of Gastroenterology, Asan Liver Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
8. Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.