^○Akira Tomie^1,2, Osamu Dohi¹, Atsushi Majima¹, Yuriko Onozawa¹, Tomoko Kitaichi¹, Yusuke Horii¹, Kentaro Suzuki¹, Hiroaki Kitae¹, Kazuhiro Kamada¹, Nobuaki Yagi², Yuji Naito¹, Yoshito Ito¹, Takahiro Kato³ (1.Dept. of Gastroent. and Hept.,Kyoto Pref. Univ. of Med.,Kyoto,Japan, 2.Dept. of Gastroent.,MURAKAMI MEMORIAL HOSPITAL ASAHI UNIV.,Gifu,Japan)

^○Taichi Ogo, Kenro Kawada, Yasuaki Nakajima, Yutaka Tokairin, Yutaka Miyawaki, Takuya Okada, Tairo Ryotokuji, naoto fujiwara, Katsumasa Saito, Hisashi Fujiwara, Masafumi Okuda, Yutaka Nakajima, Yuichiro Kume, Toshihiro Matsui, Kagami Nagai, Tatsuyuki Kawano (Dept. of Esophageal General Surgery, Tokyo Medical and Dental Univ., Tokyo, Japan)

^○Takeshi Mizushima¹, Yuichi Shimizu¹, Tomoko Mitsuhashi², Masakazu Takahashi¹, Shuichi Miyamoto¹, Momoko Tsuda¹, Masayoshi Ono¹, Saori Omori¹, Shoko Ono³, Yasuaki Mori³, Manabu Nakagawa³, Katsuhiro Mabe⁴, Soichi Nakagawa³, Mototsugu Kato³, Naoya Sakamoto¹ (1.Dept. of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medecine, Sapporo, Japan, 2.Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan, 3.Division of Endoscopy, Hokkaido University Hospital, Sapporo, Japan, 4.Department of Cancer Preventive Medicine, Hokkaido University Graduate school of Medecine, Sapporo, Japan)

^○Takuya Honbu, Tomonori Yano, Ken Hatogai, Kensuke Shinmura, Tomoji Kato, Hiroyuki Morimoto, Shozo Osera, Yusuke Yoda, Yasunori Oono, Hiroaki Ikematsu, KAZUHIRO KANEKO (Div. of Gastrointestinal Endoscopy ,Dept. of Gastroenterology,National Cancer Center Hospital East, Kashiwa, Japan)

^○Hiroaki Takahashi, Satoshi Okahara, Nobuaki Sugawara, Jyunichi Kodaira (Keiyukai Daini Hospital, Sapporo, Japan)