Oh Seong Ryeol, Kim Dong, Kim Tae Hyeon
Department of Internal Medicine, Wonkwang University Hospital, Wonkwang University School of Medicine, Iksan, South Korea.
Gastrointest Endosc. 2012 Mar;75(3):669; discussion 669-70. doi: 10.1016/j.gie.2011.10.033.