Kita Hiroto, Yamamoto Hironori, Nakamura Tetsuya, Shirakawa Katsuro, Terano Akira, Sugano Kentaro
Department of Internal Medicine, Division of Gastroenterology, Jichi Medical School, Minamikawachi, Tochigi, Japan.
Gastrointest Endosc. 2005 Apr;61(4):628-9. doi: 10.1016/s0016-5107(05)00130-6.