Affiliation: | Jung Wan Choe, Young Choon Kim, Moon Kyung Joo, Hyo Jung Kim, Beom Jae Lee, Ji Hoon Kim, Jong Eun Yeon, Jong-Jae Park, Jae Seon Kim, Kwan Soo Byun, Young-Tae Bak, Department of Gastroenterology, Korea University Guro Hospital, Seoul 08308, South Korea |