Urita Y, Kondo E, Muto M, Yamada S, Hachiya A, Ishihara M, Ozaki M, Nishino M, Naruki Y, Otsuka S
First Department of Internal Medicine, Toho University School of Medicine, Tokyo, Japan.
Gastrointest Endosc. 1996 Feb;43(2 Pt 1):140-3. doi: 10.1016/s0016-5107(06)80117-3.