Authors: Jung Min Lee; Eun Sun Kim; Hoon Jai Chun; In Kyung Yoo; Jae Min Lee; Seung Han Kim; Hyuk Soon Choi; Bora Keum; Yeon Seok Seo; Hong Sik Lee; Yoon Tae Jeen; Jong-Jae Park; Sang Woo Lee; Soon Ho Um; Chang Duck Kim Journal: Clin Endosc Date: 2017-10-10