^○Katsumi Yamamoto¹, Hirotsugu Saiki², Shiro Hayashi², Tsutomu Nishida², Masafumi Naito³, Tomoki Michida³, Toshifumi Ito¹ (1.Dept. of Gastroenterology, Japan Community Healthcare Organization Osaka Hospital, Osaka, Japan, 2.Dept. of Gastroenterology, Toyonaka Municipal Hospital, Osaka, Japan, 3.Third dep. of Internal Medicine, Teikyo University Medical Center, Chiba, Japan)

^○Masashi Kawamura, Tatsuya Kikuchi, Yoshitaka Sakai, Futoshi Nagasaki, Satoshi Takai, Eri Saitoh (Dept. of Gastroenterology, Sendai City Hospital, Miyagi, Japan)

^○Daisuke Akutsu¹, Hideo Suzuki², Toshiaki Narasaka², Masahiko Terasaki¹, Tsuyoshi Kaneko¹, Shinji Endo¹, Hirofumi Matsui¹, Yuji Mizokami², Ichinosuke Hyodo¹ (1.Dept. of Gastroenterology, University of Tsukuba, Tsukuba, Ibaraki, Japan, 2.Division of Endoscopy, University of Tsukuba Hospital, Tsukuba, Ibaraki, Japan)

^○Takuto Suzuki¹, Taro Hara¹, Rino Nankinzan², Osamu Sugita², Yoshiyasu Kitagawa², Hiroyuki Arai², Emiri Kita², Akiko Tsujimoto², Nami Nakamura², Nei Soma², Kentaro Sudo², Kazuyoshi Nakamura², Keiko Minashi², Shuichi Hironaka², Tadamichi Denda², Nobuhiro Takiguchi³, Taketo Yamaguchi² (1.Dept. of Endoscopy, Chiba Cancer Center, Chiba, Japan, 2.Dept. of Gastroenterology, Chiba Cancer Center, Chiba, Japan, 3.Dept. of Surgery, Chiba Cancer Center, Chiba, Japan)

^○Jun Ninomiya¹, Makoto Kobayashi¹, Arata Kobayashi¹, Tadashi Maegawa¹, Makoto Yamawaki¹, Kouzou Kuwabara¹, Tetsuya Mizutani¹, Yasushi Sugiura², Yoshitaka Nawata³, Kiyoaki Honma³, Motoyoshi Yano¹ (1.Yokkaichi Municipal Hospital Gastroenterology, Japan, 2.Sugiura Clinic, 3.Nihonkai General Hospital)