1. Department of Internal Medicine, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, Konkuk University Hospital, Seoul, Korea
3. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Pusan National University College of Medicine, Busan, Korea
5. AbbVie Inc, Seoul, Korea
6. Division of Gastroenterology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea