^○Akira Fukumoto¹, Shinji Nagata², Shunsuke Takata², Kei Senoo¹, Hidenori Tanaka¹, Karin Hayashi¹, Naoki Yorita¹, Yuhei Saito¹, Masanobu Yukutake¹, Hiroyuki Ueda², Koji Waki¹, Kenichi Kuwahara¹, Shigeru Kimura¹, Keiji Tsuji¹ (1.Dept. of Gastroenterology, Hiroshima City Asa Hospital, Hiroshima, Japan, 2.Dept. of Endoscopy, Hiroshima City Asa Hospital, Hiroshima, Japan)

^○Kenji Iwakura¹, Kazuhiro Ota², Kazuhide Higuchi³, Yuta Yokoya², Yoshimasa Hirata², Yusuke Tsuchimoto², Takeshi Higashino², Keisuke Yokohama³, Naoki Yorifuji³, Hideko Ohama³, kaori hujiwara³ (1.Dept. of Gastroenterology, Tesseikai Neurosurgery Hospital, Osaka, Japan, 2.Department of Gastroenterology, Shiroyama Hospital, Osaka, Japan, 3.2nd Department of Internal Medicine, Osaka Medical College, Osaka, Japan)

^○Hiroyuki Ozasa¹, Yasumi Araki¹, Toshihiro Noake¹, Kyoko Satoh¹, Keiko Matono¹, Masataka Ushijima¹, Risako Yamashita¹, Masahiro Kamori¹, Masahiro Takano¹, Yoshito Akagi² (1.Kurume Coloproctology Center, Kurume, Japan, 2.Department of Surgery, Kurume University School of Medicine, Kurume, Japan)

^○Hirotaka Kamikozuru, Yuji Inoue, Ryosuke Nakagawa, Takeshi Oki, Shinichi Nakamura, Masakazu Yamamoto (Institute of Gastroenterology, T.W.M.U , Japan)

^○Manabu Sawaya¹, Tatsuya Mikami², Norihiro Hanabata¹, Hidezumi Kikuchi¹, Hiroto Hiraga¹, Daisuke Chinda¹, Hirotake Sakuraba¹, Tadashi Shimoyama¹, Shinsaku Fukuda¹ (1.Dept. of Gastroenterology and Hematology, Graduate Sch. of Med. Hirosaki Univ., Aomori, Japan, 2.Div. of Endoscopy, Hirosaki Univ. Hosp., Aomori, Japan)