1. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Department of Internal Medicine and Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
5. Department of Internal Medicine, St. Vincent’s Hospital, The Catholic University of Korea College of Medicine, Suwon, Korea
6. Department of Internal Medicine, Inje University College of Medicine, Seoul, Korea
7. Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea
8. Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea
9. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
10. Department of Internal Medicine, Hanyang University Guri Hospital, Guri, Korea