Chang Hye-Sook, Myung Seung-Jae, Yang Suk-Kyun, Jung Hwoon-Yong, Lee Gin Hyug, Hong Weon-Seon, Kim Jin-Ho, Min Young Il, Kim Hee Cheol, Ha Hyun Kwon, Kim Jung-Sun
Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
Gastrointest Endosc. 2004 Jan;59(1):126-9. doi: 10.1016/s0016-5107(03)02352-6.