1. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, South Korea
2. Department of Internal Medicine and Liver Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
3. Department of Internal Medicine, Gospel Hospital, University of Kosin College of Medicine, Busan, South Korea
4. Digestive Disease Center, Konkuk University School of Medicine, Seoul, South Korea
5. Department of Internal Medicine, School of Medicine, Kangwon National University, Kangwon, South Korea
6. Department of Internal Medicine, Dong-A University College of Medicine, Busan, South Korea
7. Department of Internal Medicine, School of Medicine, Ewha Woman’s University, Seoul, South Korea
8. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
9. Department of Medicine, Korea University Ansan Hospital, Seoul, South Korea
10. Dongguk University Ilsan Hospital, Goyang, South Korea