Kim Hong Jun, Park Do Hyun, Ryu Choong Heon, Lee Sang Soo, Seo Dong-Wan, Lee Sung-Koo, Kim Myung-Hwan
Department of Internal Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
Gastrointest Endosc. 2011 Oct;74(4):923-4; discussion 924. doi: 10.1016/j.gie.2011.06.018.