^○Yasuko Matsuo, Takeo Nomi, Daisuke Hokuto, Takahiro Yoshikawa, Kota Nakamura, Minako Nagai, Kenji Nakagawa, Satoshi Nishiwada, Takahiro Akahori, Naoya Ikeda, Hiromichi Kanehiro, Masayuki Sho (Department of Surgery, Nara Medical University, Nara, Japan)

^○Yosuke Nakao, Katsunori Imai, Rumi Itoyama, Toshihiko Yusa, Naoki Umezaki, Masayo Tsukamoto, Takanobu Yamao, Yuki Kitano, Kota Arima, Tatsunori Miyata, Shigeki Nakagawa, Hirohisa Okabe, Hidetoshi Nitta, Yo-ichi Yamashita, Akira Chikamoto, Takatoshi Ishiko, Hideo Baba (Department of Gastroenterological Surgery, Graduate School of Life Sciences, Kumamoto University)

^○Hirotaka Tashiro¹, Sho Okimoto², Megumi Yamguchi¹, Hideki Ohdan² (1.Department of Surgery, Kure Medical Center, National Hospital Orgainization, 2.Department of Gastroenterological and Transplant Surgery Hiroshima University Hospital)

^○Hiroyuki Kanomata, Yasuji Seyama, Kazuhiro Mori (Department of Surgery, Tokyo Metropolitan Bokutoh Hospital, Tokyo, Japan)

^○Shigetoshi Naito¹, Fuminori Ishi¹, Keita Tanaka¹, Toshiko Matsumoto¹, Daisuke Kato¹, Yoshihiro Hamada², Suguru Hasegawa¹ (1.Department of Gastroenterological Surgery, Fukuoka University, Fukuoka, Japan, 2.Department of Pathology, Fukuoka University, Fukuoka, Japan)