1. Division of Gastroenterology, Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
2. Division of Gastroenterology, Department of Internal Medicine, Jeonbuk National University Medical School and Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
3. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
4. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea
5. Division of Gastroenterology, Department of Internal Medicine, Myongji Hospital, Goyang, Korea
6. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
7. Department of Gastroenterology, Kangdong Sacred Heart Hospital, Seoul, Korea
8. Department of Internal Medicine, Daejeon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Korea
9. Division of gastroenterology, Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
10. Research Institute, Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Goyang, Korea
11. Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea