^○Masao Nakajima¹, Yoshihiro Tokuhisa¹, Kensuke Yamada¹, Taichi Kuwahara¹, Yasuhiro Fujiwara¹, Takuya Fujimoto¹, Satoshi Matsukuma¹, Hiroto Matsui¹, Yukio Tokumitsu¹, Shinobu Tomochika¹, Shinsuke Kanekiyo¹, Michihisa Iida¹, Kazuhiko Sakamoto¹, Nobuaki Suzuki¹, Shigeru Takeda¹, Shigefumi Yoshino², Shouichi Hazama³, Tommie Ueno⁴, Hiroaki Nagano¹ (1.Department of Gastroenterological, Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, 2.Oncology Center, Yamaguchi University Hospital, 3.Department of Translational Research and Developmental Therapeutics against Cancer, 4.Department of Digestive Surgery, Kawasaki Medical School)

^○Kazuya Hirukawa, Masahiro Shinoda, Hideaki Obara, Minoru Kitago, Yuta Abe, Hiroshi Yagi, Kentaro Matsubara, Go Oshima, Shunichi Imai, Yuko Kitagawa (Department of Surgery, Keio University School of Medicine, Tokyo, Japan)

^○Keisuke Okura, Masato Narita, Shoko Yoshioka, Kentarou Goto, Haruka Okada, Shunpei Jikihara, Anri Maeda, Masashi Saji, Ryo Matsusue, Hiroaki Hata, Takashi Yamaguchi, Tetsushi Otani, Iwao Ikai (Department of Surgery, Kyoto Medical Center, Kyoto, Japan)

^○Takaaki Kato, Yoshihito Kotera, Akiko Ohmori, Shingo Yamashita, Satoshi Nemoto, Shunichi Ariizumi, Satoshi Katagiri, Hiroto Egawa, Masakazu Yamamoto (Department of Surgery, Institute of Gastroenterology, Tokyo Womens Medical University)

^○Kohei Ishiyama, Naoto Hadano, Takashi Onoe, Takeshi Sudo, Hirotaka Tashiro (Department of Surgery, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan)

^○Daisuke Nobuoka, Takahito Yagi, Yuzo Umeda, Ryuichi Yoshida, Takashi Kuise, Kazuhiro Yoshida, Kazuya Yasui, Daisuke Konishi, Hiroki Okabayashi, Toshiyoshi Fujiwara (Department of Gastroenterological Surgery)