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

^○Shingo Kagawa¹, Hideyuki Yoshitomi¹, Katsunori Furukawa¹, Tsukasa Takayashiki¹, Satoshi Kuboki¹, Shigetsugu Takano¹, Daisuke Suzuki¹, Nozomu Sakai¹, Hiroyuki Nojima¹, Takashi Mishima¹, Masaru Miyazaki², Masayuki Ohtsuka¹ (1.Department of General Surgery, Chiba University, Chiba, Japan, 2.International University of Health and Welfare Mita Hospital, Tokyo, Japan)

^○Hiroshi Yamaguchi, Yasutoshi Kimura, Masafumi Imamura, Minoru Nagayama, Toru Mizuguchi, Ichiro Takemasa (Department of Surgery, Surgical Oncology and Science, Sapporo Medical University)

^○Hideyuki Masui, Satoshi Kaihara, Ryosuke Kita, Koji Kitamura, Hiroki Hashida, Kenji Uryuhara, Ryo Hosotani (Department of Surgery, Kobe City Medical Center General Hospital, Kobe, Japan)

^○Hideki Shibata^1,2, Kodai Tomioka¹, Yusuke Wada¹, Tomoki Hakozaki¹, Yoshihiko Tashiro¹, Koji Nogaki¹, Kosuke Yamada¹, Kazuhiro Matsuda¹, Tomokazu Kusano¹, Tomotake Koizumi¹, Akira Fujimori¹, Yuta Enami¹, Takeshi Aoki¹, Masahiko Murakami¹ (1.Department of Gastroenterological and General Surgery, Showa University School of Medicine, Tokyo, Japan, 2.Department of Surgery, Makita general Hospital, Tokyo, Japan)

^○Toru Sano, Naokazu Chiba, Shigeto Ochiai, Kei Yokozuka, Takahiro Gunji, Kosuke Hikita, Yosuke Ozawa, Masaaki Okihara, Koichi Tomita, Rina Tsutsui, Satoshi Tabuchi, Shigeyuki Kawachi (Department of Digestive and Transplantation Surgery, Tokyo Medical University, Hachioji Medical Center)