1. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
3. Centre for Cardiovascular and Metabolic Research, Hull York Medical School, Castle Hill Hospital, University of Hull, Cottingham, East Yorkshire, United Kingdom.
4. Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
5. Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea.
6. Department of Internal Medicine, Pusan National University College of Medicine, Busan, Korea.
7. Department of Internal Medicine, Ewha Woman's University School of Medicine, Seoul, Korea.
8. Department of Pathophysiology and Simulation Centre, Jessenius Faculty of Medicine, Comenius University, Martin, Slovak Republic.