Affiliation: | 1. Division of Gastroenterology, Department of Internal Medicine, Kobe University Graduate School of Medicine. 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, Hyogo;2. Division of Gastroenterology, Konan Hospital. 1-5-16, Kamokogahara, Higashinada-ku, Kobe, Hyogo;3. Division of Endoscopic Medicine, Kobe University Hospital, 7-5-2, Kusunoki-cho, Chuo-ku, Kobe, Hyogo, Japan |