^○Hiroshi Nakamura, Hiroaki Ikematsu, KAZUHIRO KANEKO (Dept. of Gastroenterology, Endoscopy Division, National Cancer Center Hospital East, Kashiwa, Japan)

^○Naohisa Yoshida¹, Takashi Hisabe², Yuji Naito¹ (1.Dept. of Molecular Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Japan, 2.Department of Gastroenterology, Fukuoka University Chikushi Hospital)

^○Toshi Takaoka, Yasuteru Fujino, Tetsuji Takayama (Dept. of Gastroenterology, Tokushima Univ. Hospital, Tokushima, Japan)

^○Hiroki Nakamura, Shinei Kudo, Masashi Misawa (Showa University Yokohama Northern Hospital Digestive Disease Center,Yokohama,Japan)

^○Taku Sakamoto¹, Hideki Ishikawa², Yutaka Saito¹ (1.Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan, 2.Kyoto Prefectural University of Medicine, Kyoto, Japan)

^○Takashi Hisabe¹, Kenshi Yao², Akinori Iwashita³ (1.Dept. of Gastroenterology, Fukuoka University Chikushi Hospital, Chikushino, Japan, 2.Department of Endoscopy, Fukuoka University Chikushi Hospital, Chikushino, Japan, 3.Department of Pathology, Fukuoka University Chikushi Hospital, Chikushino, Japan)

^○Kenjiro Shigita¹, Shinji Tanaka¹, Kazuaki Chayama² (1.Dept. of Endoscopy, Hiroshima University, Hiroshima, Japan, 2.Department of Gastroenterology and Metabolism, Hiroshima University, Hiroshima, Japan)

^○Iwatate Mineo¹, Yasushi Sano¹, Takahiro Fujimori² (1.Gi Center, Sano Hospital, Kobe, Japan, 2.diagnostic pathology center, Shinko hospital, Koobe, Japan)

^○Hidenori Tanaka¹, Shinji Nagata², Mayumi Kaneko³ (1.Dept. of Gastroenterology, Hiroshima City Asa Hospital, Hiroshima, Japan, 2.Dept. of Endoscopy, Hiroshima City Asa Hospital, Hiroshima, Japan, 3.Dept. of Pathology, Hiroshima City Asa Hospital, Hiroshima, Japan)

^○Daiki Nemoto^1,2, Kenichi Utano¹, Kazutomo Togashi¹ (1.Dept. of Coloproctology, Aizu Med. Center, Fukushima Med. Univ., Fukushima, Japan, 2.Dept. of Gastroenterology, Jichi Med. Univ., Tochigi, Japan)

^○Arihiro Nakano¹, Takeshi Yamamura², Hidemi Goto^1,2 (1.Dept. of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Japan, 2.Department of Endoscopy, Nagoya University Hospital)

^○Shoichi Saito¹, Daisuke Ide^1,2, Masahiro Ikegami³ (1.Dept. of Endoscopy, The Jikei University School of Medicine, Tokyo Japan, 2.Divison of Gasroenterology & Hepatology, Dept. of Internal Medicine, The Jikei University School of Medicine, Tokyo Japan, 3.Dept. of Pathology, The Jikei University School of Medicine, Tokyo Japan)

^○Masashi Misawa, Shinei Kudo, Hiroki Nakamura (Digestive Disease Center, Showa University Norhtern Yokohama Hospital., Yokohama, Japan)