| Affiliation: | 1. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea;2. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea;3. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea;4. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-do, Korea;5. Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul, Korea;6. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea;7. Department of Internal Medicine, Busan Paik Hospital, Inje University, Busan, Korea |
