^○eri yoshimoto, Nobutsugu Abe, atsuko oki, Yoshikazu Hashimoto, Hirohisa Takeuchi, Tadahiko Masaki, Toshiyuki Mori, Masanori Sugiyama (Dept. of Surgery, Sch. of Med. Kyorin Univ., Tokyo, Japan)

^○Toshihiro Nishizawa¹, Hidekazu Suzuki², Takanori Kanai², Naohisa Yahagi¹ (1.Div. of Research and Development For Minimally Invasive Treatment, Cance R Center, Keio University School of Medicine, Tokyo, Japan, 2.Division of Gastroenterology and Hepatology, Department of Internal Medicine , Keio University School of Medicine, Tokyo, Japan)

^○Toshihiro Nishizawa¹, Hidekazu Suzuki², Juntaro Matsuzaki³, Takanori Kanai², Naohisa Yahagi¹ (1.Div. of Research and Development For Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan, 2.Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, 3.Center for Preventive Medicine, Keio University Hospital, Tokyo, Japan)

^○Risaburo Akasaka¹, Satoshi Kasugai¹, Ayumu Suzuki¹, Akira Ushio¹, norihiko Kudara², Masaki Endo³ (1.Dept. of Gastroenterology, Hachinohe Red Cross Hospital, Hachinohe, Japan, 2.Dept. of gastroenterology,Iwate Prefectural Ohunato Hospital, Oohunato, Japan, 3.Kaiunbashi Endoscopic Clinic)

^○Mitsutaka Shuto¹, Kazuhisa Okamoto¹, Ryo Ogawa¹, Koshiro Tsustumi¹, tomoko tokumaru¹, Kurato Wada¹, akirs sonoda¹, Kazuhiro Mizukami¹, Tadayoshi Okimoto¹, Masaaki Kodama¹, Kazunari Murakami¹, Takashi Abe², hiroshi nakashima², Takayuki Nagai², hideki ono³ (1.Oita University Oita Japan, 2.Oita kouseiren tsurumi hospital Japan, 3.Oita city arumeida hospital Japan)

^○Hayato Sasaki, Naoki Tokuhiro, Kohei Ono, Takahiro Ohgara, Maiko Yamazaki, Hidetoshi Makita, Toshihiro Fujioka, Takeshi Yamazaki, Sumiko Sahara, Toru Sato (Gastroenterology Center, Makita General Hospital, Tokyo, Japan)