Kim J, Keum B, Seo Y S, Kim Y S, Jeen Y T, Chun H J, Um S H, Kim C D, Ryu H S
Department of Internal Medicine, Institute of Digestive Disease and Nutrition, Korea University College of Medicine, Seoul, Korea.
Endoscopy. 2010;42 Suppl 2:E47. doi: 10.1055/s-0029-1215416. Epub 2010 Feb 15.