^○Toshihiro Matsui, Kenro Kawada, Yutaka Nakajima, Yuichiro Kume, Masafumi Okuda, Katsumasa Saito, naoto fujiwara, Tairo Ryotokuji, Yutaka Miyawaki, Yutaka Tokairin, Yasuaki Nakajima, Tatsuyuki Kawano (Dept. of Esophageal and General Surgery, Tyokyo Medical and Dental University, Tokyo, Japan)

^○Masahiro Yura, Rieko Nakamura, Tsunehiro Takahashi, Norihito Wada, HIrofumi Kawakubo, Hiroya Takeuchi, Yoshiro Saikawa, Tai Omori, Yuko Kitagawa (Dept. of Surgery, Keio University School of Medicine, Japan)

^○Toshiyuki Yoshio¹, Tomohiro Tsuchida¹, Akiyoshi Ishiyama¹, Toshiaki Hirasawa¹, Yorimasa Yamamoto¹, Kazuyoshi Kawabata², Junko Fujisaki¹ (1.Dept. of Gastroenterology, Cancer Institute Hospital, Tokyo, Japan, 2.Department of Head and Neck Oncology, Cancer Institute Hospital, Tokyo, Japan)

^○Yuji Kikuchi¹, Rieko Nakamura¹, HIrofumi Kawakubo¹, Kazumasa Fukuda¹, Tsunehiro Takahashi¹, Norihito Wada¹, Yoshiro Saikawa¹, Hiroya Takeuchi¹, Yuko Kitagawa¹, Tai Omori² (1.Dept. of Surgery, Keio University School of Medicine, Tokyo, Japan, 2.Kawasaki Municipal Ida Hospital, Kawasaki, Japan)

^○Tetsuya Noguchi, Tomoyuki Oikawa, Kiyoshi Utsumi, Hiroki Aizawa, Makoto Abue, Keisuke Tsukamoto, Tkehumi Miyazaki, Shinitchi Szuki (Dept.Of Gastroenterology ,Miyagi Cancer Center,Miyagi,Japan)