1. Department of Internal Medicine Korea University Medical College Seoul Korea
2. Department of Internal Medicine CHA University School of Medicine Seongnam Korea
3. Department of Internal Medicine Soonchunhyang University Medical College Seoul Korea
4. Department of Internal Medicine Chonbuk National University Medical School Jeonju Korea
5. Department of Internal Medicine Hallym University College of Medicine Seoul Korea
6. Department of Internal Medicine Inje University College of Medicine Seoul Korea
7. Department of Internal Medicine College of Medicine the Catholic University of Korea Seoul Korea
8. Department of Internal Medicine Yonsei University Medical College Seoul Korea