^○Sakae Maeda, Naoki Hama, Atsushi Miyamoto, Masatoshi Kitakaze, Takuya Hamakawa, Mamoru Uemura, Masakazu Miyake, Kazuhiro Nishikawa, Takeshi Kato, Motohiro Hirao, Mitsugu Sekimoto, Shoji Nakamori (Department of Surgery, National Hospital Organization Osaka National Hospital)

^○Takebumi Usui, Shunichi Shiozawa, Kotaro Kuhara, Akira Tsuchiya, Tatsuomi Miyauchi, Teppei Kono, Yukio Shimojima, Kentaro Yamaguchi, Hajime Yokomizo, Takeshi Shimakawa, Takao Katsube, Yoshihiko Naritaka (Department of Surgery, Tokyo Women's Medical University, Medical Center East)

^○Satomi Suzuki Uematsu, Chikashi Nakanishi, Yuta Kakizaki, Muneyuki Matsumura, Kenji Shimizu, Wataru Nakanishi, Ryuichi Nishimura, Yasuyuki Hara, Shigehito Miyagi, Takeshi Naito, Michiaki Unno, Takashi Kamei (Department of Surgery, Gastroenterological Surgery,)

^○Tomomi Kawana¹, Hideaki Kodama¹, Masahiko Fukase¹, Ayako Endo¹, Hiromune Shimamura¹, Hiroyoshi Suzuki², Junko Sakurada² (1.Department of Surgery, Sendai Medical Center, Miyagi, Japan, 2.Department of Pathology, Sendai Medical Center, Miyagi, Japan)

^○Hirotomo Murakami, Hiroshi Wada, Akira Tomokuni, Kei Asukai, Hirofumi Akita, Hidenori Takahashi, Masato Sakon (Osaka International Cancer Institute, Department of Surgery, Japan)

^○Shunsuke Tamura¹, Yukiyasu Okamura¹, Teiichi Sugiura¹, Takaaki Ito¹, Yusuke Yamamoto¹, Ryo Ashida¹, Shigeyuki Murayama², Katsuhiko Uesaka¹ (1.Department of Hepato Biliary Pancreatic Surgery, Shizuoka Cancer Center, Shizuoka, Japan, 2.Department of Proton Therapy, Shizuoka Cancer Center, Shizuoka, Japan)