^○Toshihiko Masui, Takayuki Anazawa, Kazuyuki Nagai, Asahi Sato, Kenzo Nakano, Yuichiro Uchida, Akitada Yogo, Kyoichi Takaori, Shinji Uemoto (Department of Surgery, Kyoto University, Kyoto, Japan)

^○Yoshihiro Miyasaka, Yasuhisa Mori, Kohei Nakata, Takao Ohtsuka, Masafumi Nakamura (Department of Surgery and Oncology, Kyushu University, Fukuoka, Japan)

^○Hidehiro Tajima, Mitsuyoshi Okazaki, Takahisa Yamaguchi, Yoshinao Ohbatake, Hiroyuki Shinbashi, Shinichi Nakanuma, Isamu Makino, Tomoharu Miyashita, Hiroyuki Takamura, Tetsuo Ohta (Department of Gastroenterological Surgery, Kanazawa University)

^○Wataru Izumo, Ryota Higuchi, Masakazu Yamamoto (Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan)

^○Shigetsugu Takano, Hideyuki Yoshitomi, Shingo Kagawa, Katsunori Furukawa, Tsukasa Takayashiki, Satoshi Kuboki, Daisuke Suzuki, Nozomu Sakai, Hiroyuki Nojima, Takashi Mishima, Masayuki Ohtsuka (Department of General Surgery, Chibe University, Chiba, Japan)

^○Makoto Takahashi¹, Hiroyuki Nojima¹, Satoshi Kuboki¹, Hideyuki Yoshitomi¹, Katsunori Furukawa¹, Tsukasa Takayashiki¹, Shigetsugu Takano¹, Daisuke Suzuki¹, Nozomu Sakai¹, Shingo Kagawa¹, Takashi Mishima¹, Tetsuo Yokota¹, Masaru Miyazaki², Masayuki Otsuka¹ (1.Department of General Surgery, Chiba University, Chiba, Japan, 2.International University of Health and Welfare, Mita Hospital, Tokyo, Japan)