Kanamoto K, Aoyagi K, Nakamura S, Hizawa K, Suekane H, Sakamoto K, Fujishima M
Second Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Gastrointest Endosc. 1998 Jan;47(1):73-5. doi: 10.1016/s0016-5107(98)70303-7.