^○Hiroshi Oshima¹, Osamu Watanabe¹, Masanao Nakamura¹, Takeshi Yamamura², Asuka Nagura², Masanobu Matsushita¹, Arihiro Nakano¹, Yoshiki Hirooka², Takafumi Ando¹, Hidemi Goto^1,2 (1.Dept. of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan, 2.Dept. of Endoscopy, Nagoya University Hospital, Nagoya, Japan)

^○Yuka Kobayashi, Atsuo Yamada, Ryota Niikura, Hirobumi Suzuki, Hirotsugu Watabe, Yoshihiro Hirata, Kazuhiko Koike (Dept. of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan)

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

^○Yuzo Otaki, Satohiro Matsumoto, Takehiro Ishii, Rumiko Kobayashi, Hiroyuki Tamura, Haruka Otake, Yuji Shindo, Takeshi Uehara, Harumi Kawamura, Shunsuke Urayoshi, Kenichi Yamanaka, Masatoshi Ikeda, Shinya Ushimaru, Takeharu Asano, Masanori Fukunishi, Takaaki Iwaki, Noriyoshi Sagihara, Shinichi Asabe, Hiroyuki Miyatani, Yukio Yoshida (Div. of Gastroenterology, Saitama Medical Center, Saitama, Japan)

^○Atsuko Soeda¹, Tsuyoshi Kaneko², Hiroaki Sugiyama¹, Daisuke Ochi¹, Mariko Kobayashi¹, Sayoko Shidara¹, Ayumu Motohashi¹, Kazuto Ikezawa¹, Akira Nakahara¹ (1.Dept. of Gastroenterology, Tsukuba Memorial Hospital, Tsukuba, Japan, 2.Department of Gastroenterology, Tsukuba University Hospital)