1. Department of Internal Medicine, Korea University College of Medicine, Korea
2. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
3. Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea
4. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
5. Department of Internal Medicine, Inha University School of Medicine, Incheon, Korea
6. Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea
7. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
8. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
9. Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea
10. Department of Internal Medicine, Ajou University School of Medicine, Suwon, Korea