Moon Jong Ho, Choi Hyun Jong, Lee Yun Nah
Digestive Disease Center and Research Institute, Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Bucheon/Seoul, Korea.
Gastrointest Endosc. 2014 Sep;80(3):388-91. doi: 10.1016/j.gie.2014.07.004.