^○Yoshikazu Hayashi, Haruo Takahashi, Manabu Nagayama, Yuji Ino, Yoshimasa Miura, Takahito Takezawa, Hiroyuki Sato, Hakuei Shinhata, hirotsugu Sakamoto, Tomonori Yano, keijiro Sunada, Hiroyuki Osawa, Hironori Yamamoto (Dept. of Medicine, Div. of Gastroenterology, Jichi Medical University, Japan)

^○Katsuyuki Sanga¹, Kingo Hirasawa¹, Ryosuke Kobayashi¹, Hiroaki Kaneko¹, Makomo Makazu¹, Chiko Sato¹, Atsushi Kokawa¹, Shin Maeda² (1.Dept. of Endoscopy,Yokohama City Univ Medical Center, Kanagawa Japan, 2.Dept. of Gastroenterology, Sch. of Med. Yokohama City Univ.Kanagawa,Japan)

^○kozue murayama, keijiro Sunada, Yoshikazu Hayashi, Kohei Ono, Daiki Nemoto, Yasushi Miyata (Div. of Gastroenterology,Sch.Of Med. Jichi Univ., Tochigi, Japan)

^○Yuki Hirata, Tomoaki Deguchi, Nobuhiro Nitori, Yuria Takei, Sho Anzai, Tomoaki Shirasaki, Kazuhisa Mabuchi, Takashi Fujii, Motomu Tanaka, Ayu Kato, Mikinori Kataoka, Tomohisa Kadomura, Shinji Suzuki, Yoshifumi Ikeda, Masaki Kitajima (Surgery and Digestive Diseases Center, International University of Health and Welfare, Mita Hospital, Tokyo, Japan)

^○Hiroko Otsuka, Rieko Yamada, Chihiro Tsunoda, Akiyoshi Mitsumaru, Megumi Kawashima, Takako Naritaka, Kiyo Watanabe, Teruhiko Sakamoto, Hiroyuki Kato (Dept.Of Clinical Laboratory and Endoscopy,Tokyo Women'S Medical Univercity Medical Center East,Tokyo,Japan)