Jeen Y T, Chun H J, Song C W, Um S H, Kim C D, Ryu H S, Hyun J H
Department of Internal Medicine, Institute of Digestive Disease and Nutrition, Korea University College of Medicine, Seoul, Korea.
Gastrointest Endosc. 2000 Oct;52(4):527. doi: 10.1067/mge.2000.108624.