1. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul
2. Department of Internal Medicine, Sungkyunkwan University College of Medicine, Suwon
3. Department of Internal Medicine, Yeungnam University College of Medicine, Daegu
4. Department of Internal Medicine, Chosun University College of Medicine, Gwangju
5. Department of Internal Medicine, Dankook University College of Medicine, Cheonan
6. Department of Internal Medicine, Chonnam National University Medical School, Gwangju
7. Department of Internal Medicine, Inje University College of Medicine
8. Department of Internal Medicine, University of Ulsan College of Medicine
9. Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea