^○Yumiko Fukuma, mitsuru Kaise, Shu Hoteya, Tsukasa Furuhata, Toshiro Iizuka, Toshifumi Mitani, Akira Matsui, Daisuke Kikuchi, Osamu Ogawa, Satoshi Yamashita, Akihiro Yamada, Yasutaka Kuribayashi, Kosuke Nomura, Ryusuke Kimura, masami tanaka (Gastrointestinal Medicine, Toranomon Hospital, Tokyo, Japan)

^○Kenichi Nishijima, Kazuhiro Haraguchi, Hiroshi Matuzaka (Depertment of Gastroenterology, Hara-Sanshin Hosptal, Fukuoka, Japan)

^○Michiyo Kodama^1,2, Kousaku Hata¹, Daisuke Kamino¹, Shinichirou Sugiyama¹, Tatsurou Tanimoto¹, Shinsuke Kira¹, Hirofumi Kobayashi¹, Eiko Sanuki¹, Kouji Sumii¹ (1.Dept. of Medical Gastroenterology, Saiseikai Hiroshima Hospital, Hiroshima, Japan, 2.Department of Medical Oncology, Saiseikai Hiroshima Hospital, Hiroshima, Japan)

^○Setsuo Yamazaki¹, Tomohiro Iida¹, Kensuke Furuya¹, Yousuke Arai¹, Tsutomu Kobatake¹, Masashi Namikawa¹, Sakae Maruta¹, Kouji Shibata², Takashi Hiromatsu², Masanobu Yamada³ (1.Kiryu Kosei General Hospital, Gunma, Japan, 2.Kiryu Kosei General Hospital, Gunma, Japan, 3.Gunma University Department of Medicine and Molecular Science, Gunma, Japan)

^○atsushi shirahata, Sou adachi, Ken sujishi, Kiyotoshi hashimoto, yasuaki miura, mayumi ooyama, masahiro waseda, tetsutarou Suzuki, yoshihiro takasaka, tadashi matsumoto, yasuo ishida (Dept. of Surgery, Yokohama Asahi Central Hospital, Yokohama, Japan)