Takao Y, Shimamoto C, Hazama K, Itakura H, Sasaki S, Umegaki E, Nakagawa K, Hirata I, Katsu K
Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Osaka, Japan.
Gastrointest Endosc. 2000 Mar;51(3):353-5. doi: 10.1016/s0016-5107(00)70370-1.