^○Dae Joon Park, Young-Ju Rhyu, Sun-Jong Han, Young-Hoon You, Sung-Ho Choi, Dong-Wook Choi, In-Woong Han, Jin-Seok Heo (Department of General Surgery, Samsung Medical Center)

^○Kaichiro Kato, Yosuke Kato, Masahiro Ooshima, Takuo Hara (Department of Surgery, Kouseiren Takaoka Hospital)

^○Toshio Shikano, Tatsuya Masuda, Yuuma Yokoi, Naoya Takeda, Masato Shizuku, Masashi Hattori, Hitoshi Teramoto, Keisuke Hattori, Yutaka Mizuno, Hirotaka Maruyama, Takehiro Hachisuka, Toshihiro Mori (Department of Surgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan)

^○Toshiyuki Hata, Takafumi Machimoto, Tomohide Hori, Tatsuo Ito, Yusuke Kimura, Tsunehiro Yoshimura (Department of Gastrointestinal Surgey, Tenri Hospital, Nara, Japan)

^○Makoto Nishikawa, Takazumi Tsunenari, Toru Kato, Mayumi Hoshikawa, Takahiro Einama, Takuji Noro, Suefumi Aosasa, Hideki Ueno, Junji Yamamoto (Depattment of Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan)

^○Ning Pu (Department of General Surgery, Zhongshan Hospital, Fudan University)