Hizawa K, Kawasaki M, Kouzuki T, Aoyagi K, Fujishima M
Second Department of Internal Medicine and Second Department of Pathology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Gastrointest Endosc. 1999 Mar;49(3 Pt 1):391-2. doi: 10.1016/s0016-5107(99)70021-0.