^○Masao Hanafusa¹, Yoji Takeuchi², Hiroyasu Iishi², Bensuleiman Yahya¹, Kazuyo Fujimoto¹, Kazunari Sasaki¹, Kenichi Hayashi¹, Junya Ando¹, Takuo Kado¹, Shiei Yoshida¹, Yuichi Harano¹, Satoshi Myojo¹, Takatoshi Nakashima¹, Yoichiro Nakamura³, Manabu Takamatsu³, Shunichi Yoshida¹, Hirofumi Kosuga³, Shigeaki Sawai¹ (1.Dept. of Gastroenterology, Akashi Medical Center, Hyogo, Japan, 2.Dept. of Gastrointestinal Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan, 3.Dept. of Surgery, Akashi Medical Center, Hyogo, Japan)

^○Tatsuya Shirakura, Yasumoto Suzuki, Haruo Nishino, Hiroshi Nozawa, Keiji Takahashi, Hideyuki Koshino, kouichi Nakajima, Yoko Okamura, Sei Yahara, Kenichi Doi, Migusa Otsuka, Yutaka Watanabe (Colo-Proctology Center,Matsushima Clinic,Yokohama,Japan)

^○Yoshiya Kawanami, Tomoko Koide, Keiko Kotabe, Tomoko Yokoyama, Tadashi Shiwa (Fujifilm Health Care Center, Minamiashigara Shi, Japan)

^○Masayoshi Tadehara¹, shohei ooka¹, Kana Kawagishi¹, Kaoru Yokoyama¹, Miwa Sada¹, Kiyonori Kobayashi², Wasaburo Koizumi¹ (1.Dept. of Gastroenterology, Kitasato University School of Medicine, Kanagawa, Japan, 2.Research and Development Center for New Medical Frontiers, Kitasato University School of Medicine, Kanagawa, Japan)

^○Yo Kubota¹, shohei ooka¹, Kana Kawagishi¹, Kaoru Yokoyama¹, Miwa Sada¹, Kiyonori Kobayashi², Wasaburo Koizumi¹ (1.Dept. of Gastroenterology Kitasato Uniersity School of Medicine Kanagawa Japan, 2.KItasato Uniersity School of Medicine Kanagawa Japan)