^○Shinichi Ikuta, Tsukasa Aihara, Yoshihiko Nakamnoto, Takayoshi Nakajima, Ikumi Hamano, Yuu Kitamura, Masako Akatsuka, Naoki Yamanaka (Department of Surgery, Meiwa Hospital)

^○Satoru Furuhashi, Takanori Sakaguchi, Ryo Kitajima, Ryota Kiuchi, Makoto Takeda, Takanori Hiraide, Yasushi Shibasaki, Yoshifumi Morita, Hirotoshi Kikuchi, Hiroya Takeuchi (Second Department of Surgery, Hamamatsu University School of Medicine, Shizuoka, Japan)

^○Masashi Horiguchi, Yoichirou Uchida, Akimori Miki, Ryu Ohno, Kentarou Kadono, Tomohiro Okamoto, Ryo Kamimjura, Hiroaki Terajima (Department of Gastroentrological Surgery, Kitano Hospital Tazuke Kofukai Medical Reserch Institute ,Osaka,Japan)

^○Aoi Hayasaki, Masashi Kishiwada, Yusuke Iizawa, Takehiro Fujii, Hiroyuki Kato, Akihiro Tanemura, Yasuhiro Murata, Yoshinori Azumi, Naohisa Kusiyama, Shugo Mizuno, Masanobu Usui, Hiroyuki Sakurai, Shuji Isaji (Mie University School of Medicine, Mie, Japan)

^○Sojun Hoshimoto, Shoichi Hishinuma, Hirofumi Shirakawa, Moriaki Tomikawa, Iwao Ozawa, Yoshiro Ogata (Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center)

^○Taisuke Uemura¹, Hidenori Ohe¹, Teppei Momono¹, Haruku Fujita¹, Asami Okabe¹, Wataru Hirata¹, Kenjiro Hirai¹, Sato Suzaki¹, Tsuyoshi Tachibana¹, Hiroshi Okabe¹, Naoko Masuzawa², Shinshichi Hamada², Akira Mitsuyoshi¹ (1.Department of Surgery, Otsu City Hospital, Shiga, Japan, 2.Department of Pathology, Otsu City Hospital, Shiga, Japan)