1. Yonsei University College of Medicine Seoul Republic of Korea
2. Department of Internal Medicine Yonsei University College of Medicine Seoul Republic of Korea
3. Department of Internal Medicine Korea University College of Medicine Seoul Republic of Korea
4. Department of Internal Medicine Catholic University of Daegu School of Medicine Daegu Republic of Korea
5. Department of Internal Medicine Keimyung University School of Medicine Daegu Republic of Korea
6. Department of Internal Medicine Soonchunhyang University College of Medicine Bucheon Hospital Bucheon Republic of Korea
7. Department of Internal Medicine Hallym University College of Medicine Chuncheon Republic of Korea
8. Department of Internal Medicine Inha University School of Medicine Incheon Republic of Korea
9. Department of Internal Medicine Soonchunhyang University College of Medicine Seoul Hospital Seoul Republic of Korea