^○YASUHARU MAEDA, Shinei Kudo, Kunihiko Wakamura, Hideyuki Miyachi, Masashi Misawa, Yuichi Mori, Toyoki Kudo, Tomokazu Hisayuki, Kenta Kodama, Takemasa Hayashi, Atsushi Katagiri, Toshiyuki Baba, Fumio Ishida (Digestive Disease Center, Showa University Northern Yokohama Hospital, Japan)

^○makiko Mori¹, Koichi Koizumi¹, Go Kuwata¹, Taku Tabata², Susumu Iwasaki¹, Kazuro Chiba¹, Sawako Kuruma¹, Takashi Fujiwara¹, Junko Fujiwara², Takeo Arakawa², Kumiko Monma², shinichiro Horiguchi³, Terumi Kamisawa¹ (1.Tokyo Metropolitan Cancer and Infectious Deseases Center Komagome Hospital, Japan, 2.Tokyo Metropolitan Cancer and Infectious Deseases Center Komagome Hospital, 3.Tokyo Metropolitan Cancer and Infectious Deseases Center Komagome Hospital)

^○Shozo Osera¹, Hiroaki Ikematsu¹, Satoshi Fujii², Tomoji Kato¹, Hiroyuki Morimoto¹, Yusuke Yoda¹, Yasunori Oono¹, Tomonori Yano¹, Atsushi Ochiai², KAZUHIRO KANEKO¹ (1.Dept. of Gastroenterology, Endoscopy Division, National Cancer Center Hospital East, Kashiwa, Chiba, Japan, 2.Pathology Division, Research Center for Innovative Oncology, National Cancer Center Hospital East, Kashiwa, Japan)

^○Eiji Sakai¹, Atsushi Kaneda², Atsushi Nakajima¹ (1.Dept. of Gastroenterology and Hepatology, Sch. of Med. Yokohama City Univ.,Yokohama, Japan, 2.Dept. of Molecular Oncology, Grad. Sch. of Med., Chiba Univ.)

^○Shinji Nagata¹, Naoki Yorita², Mayumi Kaneko³ (1.Hiroshima City Asa Hospital, Dept. of Endoscopy, Japan, 2.Hiroshima City Asa Hospital, Dept. of Gastroenterology, 3.Hiroshima City Asa Hospital, Dept. of Pathology)

^○Shigetsugu Tsuji, Shinya Yamada, Hisashi Doyama (Dept. of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan)

^○Tomoyoshi Shibuya, osamu nomura, hirofumi fukushima, Yuzuru Tajima, takashi murakami, Kohei Matsumoto, hideaki ritsuno, hiroya ueyama, tomohiro kodani, yoshihiro inami, dai ishikawa, kenshi matsumoto, naoto sakamoto, Taro Osada, akihito nagahara, Tatsuo Ogihara, sumio watanabe (Dept. of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan)

^○Nobuaki Nishimata^1,2, Akio Matsuda¹, Shunji Shimaoka¹, Saori Iifuku¹, YUKIKO BABA¹, Hirotake Kusumoto¹, KOSUKE IWAKI¹, Koichiro Tsukasa¹, Kotaro Tashiro¹, Tatsuyuki Nioh¹, Tooru Niihara¹, Yoshito Nishimata¹, Masahide Hori¹, HIROTO NISHIMATA¹ (1.Dept. of Gastroenterology, Nanpuh Hospital, Kagoshima, Japan)

^○Takeaki Matsuzawa^1,9, Hideyuki Ishida¹, Shuntaro Yoshida^2,9, Hiroyuki Isayama^2,9, Huminori Teraishi^3,9, Takeshi Oki^4,9, Hiroyuki Kato^5,9, Shiro Hayashi^6,9, Masayoshi Yoshimitu^7,9, Taku Sakamoto^8,9, Takuya Yamaguchi⁹, Masateru Yoshikawa⁹, Takahiro Horimatsu⁹, Shungo Endo⁹, Masayoshi Horimoto⁹, Shigenori Masaki⁹, Shigenori Ushigome⁹, Masafumi Inomata⁹, Kensuke Kubota⁹, Yasushi Nakamura⁹, Yoshihisa Saida^9,10 (1.Dept. of Digestive Tract and General Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan, 2.Department of Internal medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, 3.Kochi Health Science Center, 4.Tokyo Women's Medical University, 5.Tokyo Women's Medical University Medical Center East, 6.Toyonaka Municipal Hospital, 7.Hiroshima City Asa Hospital, 8.National Cancer Center Hospital, 9.Colonic Stent Safe Procedure Research Group, 10.Department of Surgery, Toho University Ohashi Medical Center, Tokyo, Japan)

^○Yoshiya Kobayashi, Maho Kusunoki, Yoshiko Takahashi, Goichi Uno, Sayaka Nakashima, Mika Yuki, Yoshinori Komazawa, Toshihiro Shizuku (Div. of Internal Medicine, Izumo City General Medical Center, Shimane, Japan)