^○Yoshitaka Imoto, Takahiro Einama, Mayumi Hoshikawa, Makoto Nishikawa, Takuji Noro, Suefumi Aosasa, Junji Yamamoto (Department of Surgery, National Defense Medical College, Tokorozawa City, Japan)

^○Masaki Wakasugi¹, Yumiko Yasuhara², Kyotaro Yoshida², Satoshi Oshima¹ (1.Department of Surgery, Kinki Central Hospital, Hyogo, Japan, 2.Department of Pathology, Kinki Central Hospital, Hyogo, Japan)

^○Yusuke Nishi, Tarou Nakamura (Department of Surgery, Uwajima City Hospital, Ehime, Japan)

^○Takashi Miyata¹, Yuta Fujiwara¹, Koji Nishijima¹, Fumio Futagami¹, Takashi Nakamura¹, Hiroyuki Takamura² (1.Department of Surgery, Red Cross Kanazawa Hospital, Ishikawa, Japan, 2.Department of Gastroenterological Surgery, Division of Cancer Medicine Graduate School of Medicine, Kanazawa University, Ishikawa, Japan)

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

^○Yuuki Amano¹, Shinjiro Kobayashi¹, Kohei Segami¹, Hiroyuki Hoshino¹, Tatunori Ono¹, Keisuke Ida¹, Masafumi Katayama¹, Satoshi Koizumi¹, Ichiro Maeda², Takashi Hujino^2,3, Msayuki Takagi², Takehito Otsubo¹ (1.Department of Digestive and General Surgery, St. Marianna University School of Medicine, Kanagawa, Japan, 2.Department of Pathology, St. Marianna University School of Medicine, Kanagawa, Japan, 3.Department of Diagnostic Pathology, Saitama Medical University International Medical Center, Saitama, Japan)