^○Kyohei Kai, Nanako Yasui, Ken Kojima, Yoshikatsu Endo, Takanori Watanabe, Shiso Sato (Department of Surgery, Redcross Hospital, Himeji, Japan)

^○Takeo Toda, Akihiko Takagi, Yusuke Kyoden, Masaya Watanabe, Kou Ohata, Hideyuki Kanemoto, Noriyuki Oba, Masakazu Takagi (Department of Gastrointestinal Surgery, Shizuoka General Hospital, Shizuoka, Japan)

^○Dal Ho Kim, Masayuki Honda, Tsuguo Sakamoto (Department of Surgery, Sainokuni Higashiomiya Medical Center, Saitama, Japan)

^○Seoung Yoon Rho, Ho Kyoung Hwang, Jae Wook Jung, Yoon Dong Sub, Woo Jung Lee, Chang Moo Kang (Department of Surgery, Yonsei University)

^○Shuji Komori, Toyoo Nitta, Masahiko Kawai (Department of Surgery, Gifu Prefectural General Medical Center, Gifu, Japan)

^○Kiyoshi Hiramatsu, Toshiyuki Arai, Takashi Seki, Daisuke Kuga, Haruhisa Kawanami, Yumi Suzuki (Department of Surgery, Anjo Kosei Hospital, Aichi, Japan)