^○Shinjiro Kobayashi, Keisuke Ida, Kohei Segami, Hiroyuki Hoshino, Masafumi Katayama, Satoshi Koizumi, Takehito Otsubo (Division of Gastroenterological and General Surgery, St. Marianna University School of Medicine, Kanagawa, Japan)

^○Toru Ikegami, Tomoharu Yoshizumi, Masafumi Ohira, Takashi Motomura, Yohei Mano, Takeo Toshima, Shinji Itoh, Noboru Harada, Yuji Soejima, Yoshihiko Maehara (Department of Surgery and Science, Kyushu University, Fukuoka, Japan)

^○Shuji Suzuki¹, Tsunehiko Maruyama¹, Mitsugi Shimoda¹, Yatsuka Sahara², Yuichi Nagakawa², Akihiko Tsuchida² (1.Department of Gastroenterological Surgery, Ibaraki medical center, Tokyo medical university, Ibaraki, Japan, 2.Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan)

^○Yoshiyasu Kato¹, Suguru Yamada², Masaya Suenaga², Hideki Takami², Yukiko Niwa², Masamichi Hayashi², Tomonari Asano², Daishi Morimoto², Haruyoshi Tanaka², Yasuhiro Kodera² (1.Department of Surgery, Nishio Municipal Hospital, 2.Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine)

^○Yusuke Watanabe, Sho Endo, Tomohiko Shinkawa, Yuji Abe, Kazuyoshi Nishihara (Department of Surgery, Kitakyushu Municipal Medical Center)

^○Hidejiro Urakami, Takayuki Kondo, Yasuhito Sekimoto, Yuichi Nishihara, Yoshiki Kawaguchi, Jo Tokuyama, Shiko Seki, Akira Matsui, Takashi Oishi, Yo Isobe (Department of Surgery, National Hospital Organization Tokyo Medical Center)