^○Tamotsu Sagawa¹, Yasuo Takahashi¹, Koshi Fujikawa¹, Hidetoshi Ohta², Yasuhiro Sato¹, Tokiko Nakamura¹ (1.Div. of Gastroenterology, National Hospital Organization Hokkaido Cancer Center, Sapporo, Japan., 2.Division of Gastroenterology, Sapporo Orthopaedics and Cardiovascular Hospita, Sapporo, Japan)

^○Mitsunori Maeda¹, Masakazu Nakano¹, Keiichi Tominaga², Takako Sasai², Tetsuya Nakamura³, Akira terano⁴, Hideyuki Hiraishi² (1.Dept. of Gastroenterology, Nikko Medical Center of Dokkyo Medical Univ., Tochigi, Japan, 2.Dept. of Gastroenterology, Dokkyo Medical Univ., Tochigi, Japan, 3.Medical information center, Dokkyo Medical Univ., Tochigi, Japan, 4.Dokkyo School, Saitama, Japan)

^○HIROTAKA SHIMIZU, Katsuhiro Arai (National Center For Child Health and Development, Japan)

^○Yasutaka Jodai, Naoki Omiya, Ichiro Hirata (Dept.Of Gastroenterology,Fujita Healh Univercity,Aichi,Japan)

^○Asuka Nagura¹, Osamu Watanabe², Masanao Nakamura², Takeshi Yamamura¹, Masanobu Matsushita², Toru Yoshimura², Yoshiki Hirooka¹, Takafumi Ando², Hidemi Goto^1,2 (1.Dept. of Endoscopy, Nagoya University Hospital, Nagoya-City, Japan, 2.Department of Gastroenterology and Hepatology, Nagoya University Graduate school of medicine, Nagoya-city, Japan)

^○Masashi Fukushima¹, Takahiko Ito¹, Kazuhiro Matsumoto¹, Kazuya Hosotani¹, Tatsunori Minamide¹, Hiroki Kitamoto¹, Yohei Taniguchi¹, Masaya Wada¹, Naoto Shimeno¹, satoko inoue¹, Hiroshi Tei¹, Yoshiki Suginoshita¹, Tetsuro Inokuma¹, Keiichiro Uehara², Yukihiro Imai² (1.Dept. of Gastroenterology, Kobe City Medical Center General Hospital, Hyogo, Japan, 2.Dept. of Pathology, Kobe City Medical Center General Hospital, Hyogo, Japan)