^○Takeshi Yamashina, Yoji Takeuchi, Noriya Uedo (Dept. of Gastrointestinal Oncology, Osaka Medical Center For Cancer and Cardiovascular Diseases, Osaka, Japan)

^○Yoshiro Tamegai, Teruhito Kishihara, Kenjiro Morishige, Myungchul Kim, Hirotaka Ishikawa, Oosumi Hiroki, Okamoto Kohei, Akiko Chino, Masahiro Igarashi (Endoscopy Division, Cancer Institute Hospital, Tokyo, Japan)

^○Hiroki Sato, Nobuhiro Ueno, Tatsuya Utsumi, Aki Sakatani, Kazuyuki Tanaka, Tatsuya Dokoshi, Shugo Fujibayashi, Sin Kashima, Takuma Goto, Jyunpei Sasajima, Kentaro Moriichi, mikihiro fujiya, Yutaka Kohgo (Div. of Gastroenterology and Hematology/Oncology, Dept. of Medicine, Asahikawa Medical University, Japan)

^○Tadateru Maehata¹, Toshio Uraoka^1,2, Teppei Akimoto¹, Satoshi Kinoshita¹, Seiji Sagara¹, Motoki Sasaki¹, Toshihiro Nishizawa¹, Osamu Goto¹, Ai Fujimoto¹, Yasutoshi Ochiai¹, Naohisa Yahagi¹ (1.Div. of Research and Development For Minimally Invasive Treatment, Cancer Center, Sch. of Med. Keio Univ., Tokyo, Japan, 2.Div. of Gastroenterology, Tokyo Medical Center, National Hospital Organization, Tokyo, Japan)

^○Masanori Takahashi¹, Keita Sasajima¹, Ryo Chinzei¹, Iichiro Otsu¹, Hirosato Doi¹, Hayato Takada¹, Tadashi Oshima¹, Yohei Koshima¹, Hidenobu Watanabe² (1.Gastroenterology, Saitama Red Cross Hospital, Saitama, Japan, 2.Pathology and cytology labolatories, PCL Japan, Tokyo, Japan)