1. Department of Internal Medicine, Medical School of Yeungnam University, Daegu, Korea.
2. Drug Safety Monitoring Center, Seoul National University Hospital, Seoul, Korea.
3. Department of Internal Medicine, College of Medicine, Dong-A University, Busan, Korea.
4. Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
5. Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea.
6. Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
7. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
8. Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul, Korea.
9. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.
10. Department of Internal Medicine, Gyeongsang National University College of Medicine, Gyeongsang National University Hospital, Jinju, Korea.
11. Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Korea.
12. Department of Pulmonology and Allergy, Hallym University Dongtan Sacred Heart Hospital, Hwaseong and Allergy and Clinical Immunology Research Center, Hallym University College of Medicine, Chuncheon, Korea.
13. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
14. Department of Internal Medicine, Pusan National University College of Medicine, Busan, Korea.