Authors: Ii-Kwun Chung; Jun Haeng Lee; Suck-Ho Lee; Sun-Joo Kim; Joo Young Cho; Won Young Cho; Young Hwangbo; Bo Ra Keum; Jong Jae Park; Hoon-Jai Chun; Hoi Jin Kim; Jae J Kim; Sam-Ryong Ji; Sang Young Seol Journal: Gastrointest Endosc Date: 2009-02-27 Impact factor: 9.427