Sakata K, Ishida M, Hiraishi H, Sasai T, Watanabe N, Suzuki Y, Masuyama H, Terano A
Second Department of Internal Medicine, Dokkyo University School of Medicine, Mibu, Tochigi, Japan.
Gastrointest Endosc. 1998 Mar;47(3):294-9. doi: 10.1016/s0016-5107(98)70330-x.