1. Department of Gastroenterology and Hepatology, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
2. Department of Gastroenterology and Hepatology, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
3. Department of Gastroenterology and Hepatology, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
4. Department of Radiology, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
5. Department of Radiology, Eunpyeong St. Mary’s Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea
6. Department of Computer Science & Engineering, Incheon National University, Incheon 22573, Republic of Korea