^○Yuichiro Ikebuchi, Kazuo yashima, Akihiro Tamoto, Kohei Hosoda, Sohei Yamamoto, Soichiro Kawata, Takumi Onoyama, Shintaro Sawada, Ryo Abe, Kazuya Matsumoto, Koichiro Kawaguchi, Kenichi Harada, Yoshikazu Murawaki (Div. of Medicine and Clinical Science, Fuculty of Medicine, Tottori Univ., Tottori, Japan)

^○Toshiyuki Wakatsuki¹, Haruhiro Yamashita¹, Yasushi Hukumoto¹, Shinnichi Hurutachi¹, Yoshihiro Oohuji¹, Kouki Matsushita¹, Masaki Tokumo² (1.Dept. of Gastroenterology & Hepatology, Okayama Medical Center, Okayama, Japan, 2.Dept. of Surgery, Okayama Medical Center, Okayama, Japan)

^○Yu Nishida, Sayuri Tanaka, Shiho U, Ryota Aoki, Nobuhiro Takeuchi, Yusuke Nomura, Hidetoshi Tada, Tetsuo Maeda (Dept. of Gastroenterology,Kawasaki Hospital,Kobe,Japan)

^○Koichiro Kojima, Tadahiko Masaki, Kohe Takayasu, Tomokazu Kishiki, Takeshi Watanabe, Yutaka Suzuki, Hiroyoshi Matsuoka, Nobutsugu Abe, Toshiyuki Mori, Masanori Sugiyama (Depertment of Surgery, School of Medicine, Kyorin University, Tokyo, Japan)

^○Takayuki Nishi¹, Hideo Shimada¹, Hiroshi Fukumitsu¹, Miho Nitta¹, Takashi Machida¹, Hiroshi Miyakita¹, Koichi Shiraishi², Ryuzo Deguchi², Narisuke Gocho², Fumio Nakahara², Kazunori Myozin³, Yoshimi Nagata³, Shinkichi Sato⁴ (1.Dept. of Surgery, Tokai Univ. Oiso Hospital , Kanagawa, Japan, 2.Dept. of gastrointestinal medicine, Tokai Univ. Oiso Hospital , Kanagawa, Japan, 3.Dept. of image diagnosis, Tokai Univ. Oiso Hospital , Kanagawa, Japan, 4.Dept. of pathology , Tokai Univ. Oiso Hospital , Kanagawa, Japan)