^○Masashige Nishimura, Yoshifumi Iwagami, Hidetoshi Eguchi, Daisaku Yamada, Tadafumi Asaoka, Takehiro Noda, Kunihito Gotoh, Shogo Kobayashi, Masaki Mori, Yuichiro Doki (Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Osaka, Japan)

^○Chiaki Kobatake, Hiroshi Sadamori, Masayoshi Hioki, Kazuteru Monden, Masashi Yoshimoto, Norihisa Takakura (Department of Surgery, Fukuyama City Hospital, Hiroshima, Japan)

^○Akira Fujimori, Takeshi Aoki, Yuta Enami, Tomitake Koizumi, Tomokazu Kusano, Kyusuke Yamada, Yoshihiko Tashiro, Kyudai Tomioka, Masahiko Murakami (Department of Gastroenterological & General Surgery, School of Medicine, Showa University, Tokyo, Japan)

^○Hidehiro Sawa^1,2, Takeshi Urade¹, Yoshiteru Iwatani¹ (1.Department of Surgery, Kita-Harima Medical Center, 2.Department of Surgery, Kakogawa Central City Hospital, Kakogawa, Japan)

^○Kotaro Kuhara, Shunichi Shiozawa, Takebumi Usui, Teppei Kono, Yukio Shimojima, Tatsuomi Miyauchi, Akira Tsuchiya, Kentaro Yamaguchi, Hajime Yokomizo, Kazuhiko Yoshimatsu, Takeshi Shimakawa, Takao Katsube, Yoshihiko Naritaka (Departent of Surgery, Tokyo Woman's Medical University , Medical center East)

^○Akihiro Yamaguchi, Hiroki Taniguchi, Yoshitaka Nakamura, Momoko Todo, Yukihisa Nishimura, Yutaka Kondo, Kiyoto Atuji (Depertment of Surgery Japanese Red Cross Kyoto Daini Hospital)