^○Satoshi Egawa¹, Shinjiro Yamaguchi¹, Masahide Oshita¹, Naoki Mizutani⁴, Takeshi Nakamura⁴, Hideki Hagiwara⁴, Kenji Hibino², Yuko Sakakibara², Takuya Yamada², Eiji Mita², Fumihiko Nakanishi⁵, Masahiko Tsujii³, Tetsuo Takehara³ (1.Osaka Police Hospital, Osaka, Japan, 2.National Hospital Organization, Osaka Medical Center, Osaka, Japan, 3.Dep, of Gastroenterology and Hepatology, Osaka university graduate school of medicine, Osaka, Japan, 4.Kansai Rosai Hospital, Hyogo, Japan, 5.National Hospital Organization, Osaka Minami Medical Center)

^○Kentaro Kojima, Nobuo Toda, Satoshi Kawamura, Yuki Karasawa, Yuki Hayata, Daisaku Ito, Mari Yamagami, Tomoharu Yamada, Koki Kawanishi, Koki Sato, Takamasa Oki, Michiharu Seki, Kazumi Tagawa (Dept. of Gastroenterology, Mitsui Memorial Hospital, Tokyo, Japan)

^○Tomio Ogiso, Kentaro Kojima, Chiaki Watanabe, Satoshi Watanabe, Naoki Watanabe, Yuusuke Suzuki, Masanori Nakashima, Naohumi Kawade, Hideki Hayashi, Tsuyoshi Mukai, Akihiko Sugiyama, Youichi Nishigaki, Tomohiro Katou, Eiichi Tomita (Dept. of Gastroenterology, Gifu Municipal Hospital, Gifu, Japan)

^○Daisuke Kawai, Koji Takemoto, Shigeatsu Fujiki, Eriko Yasutomi, Shotaro Okanoue, Tomoko Sunami, Shohei Oka, Yuki Baba, Hisashi Ishikawa, Ryuta Takenaka, Hirofumi Tsugeno (Digestive Endoscopy Center, Tsuyama Central Hospital, Japan)

^○Hiroshi Suito, Masaya Uesato, Yorihiko Mutou, Yoshihide Senba, Yukiko Ogura, Ryoma Urahama, Akira Nakano, Mizuho Aikawa, Hisahiro Matsubara (Dept. of Frontier Surgery, Sch. of Med. Chiba Univ., Chiba, Japan)