Chun Hoon Jai, Jeen Yoon-Tae, Park Sung Chul, Keum Bora, Seo Yeon Seok, Um Soon Ho, Kim Chang Duck, Ryu Ho Sang
Department of Internal Medicine, Institute of Digestive Disease and Nutrition, Korea University College of Medicine, Seoul, Korea.
Gastrointest Endosc. 2010 Mar;71(3):619-20; discussion 620. doi: 10.1016/j.gie.2009.10.001.