1 Division of Gastroenterology, Department of Internal Medicine, Chungnam National University Sejong Hospital, 20, Bodeum 7-ro, Sejong, 30099, Republic of Korea.
2 Department of Internal Medicine, School of Medicine, Chungnam National University, 266, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea.
3 Division of Gastroenterology, Department of Internal Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea.
4 Division of Infectious Disease, Department of Internal Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea. episodes22@hanmail.net.
5 Department of Internal Medicine, School of Medicine, Chungnam National University, 266, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea. episodes22@hanmail.net.
6 Division of Gastroenterology, Department of Internal Medicine, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea. hyuksoo@cnuh.co.kr.
7 Department of Internal Medicine, School of Medicine, Chungnam National University, 266, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea. hyuksoo@cnuh.co.kr.