^○Takumi Hikawa, Takahiro Einama, Mayumi Hoshikawa, Makoto Nishikawa, Takuji Noro, Yoshiki Kajiwara, Eiji Shinto, Satsuki Mochizuki, Yoshiyuki Yaguchi, Shuuichi Hiraki, Suehumi Aozasa, Hironori Tsujimoto, Kazuo Hase, Hideki Ueno, Junji Yamamoto (National Defence Medical colleage Hospital, Saitama, Japan)

^○Ryuji Komine, Atsushi Shimizu, Keisuke Minamimura, Kazuhiko Mori, Toru Hirata, Takashi Kobayashi (Department of Gastroenterological Surgery, Mitsui Memorial Hospital, Tokyo, Japan)

^○Ryuichi Kawahara, Shinichi Taniwaki, Yoshihiro Uchino, Taro Nishimura, Shin Sasaki, Shoichiro Arai, Satoki Kojima, Nobuhisa Shirahama, Toshihiro Sato, Yoriko Nomura, Yusuke Hirakawa, Kazuhiro Mikagi, Hisamune Sakai, Hiroto Ishikawa, Toru Hisaka, Masafumi Yasunaga, Yoshito Akagi, Koji Okuda (Department of Surgery, Kurume University School of Medicine)

^○Shinsuke Nakashima, Terumasa Yamada, Yoshinao Chinen, Hiroaki Itakura, Hirotoshi Takayama, Yujiro Tsuda, Masami Ueda, Katsuya Ohta, Shinichi Adachi, Shunji Endo, Masakazu Ikenaga (Department of Gastroenterological Surgery, Higashiosaka city medical center, Osaka, Japan)

^○Katsuhiko Ito, Yoshiaki Simizu, Kei Nishiya, Yasuyuki Nakata (Department of Surgery, Narita Red Cross Hospital, Chiba, Japan)

^○Satoshi Nara, Minoru Esaki, Yoji Kishi, Toshimitsu Iwasaki, Kengo Fukuoka, Kazuaki Shimada (Hepatobiliary and Pancreatic Surgery Division, National Cancer Center Hospital, Japan)