Kim Seong Yun, Park Seong Ho, Lee Seung Soo, Oh Seong Tae, Choi Kee Don, Kim Ah Young
Department of Radiology, Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
Gastrointest Endosc. 2008 Apr;67(4):769-71. doi: 10.1016/j.gie.2007.08.016. Epub 2007 Dec 26.