^○Akira Kamei, Tosiaki Todoki, Katunoro Nonohi, Noriko Watanabe (Mie Central Medical Center, Dept. of Gastroenterology, Japan)

^○Hiromitsu Ban¹, Chihiro Okayama², Hiroshi Hasegawa², Rie Oosaki², Atsushi Nishida², Makoto Shioya², Takashi Nishimura², Osamu Inatomi², Shigeki Banba², Akira Andoh² (1.Div. of Endoscopy, Shiga University of Medical Science, Shiga, Japan, 2.Div. of Gastroenterology, Shiga University of Medical Science, Shiga, Japan)

^○Koichi Furukawa¹, Toshiyuki Yamazaki², Hideki Hashidate³, Masahiro Ogawa¹, Munehiro Sato¹, Akihiko Oosaki¹, Tuneo Aiba¹, Osamu Yoneyama¹, Nobuo Waguri¹, kentaro Igarasi¹, Akira Iwaya², Michihiro Shibuya³ (1.Div. Gastroenterology, Niigata City General Hospital, Japan, 2.General Surgery, 3.Pathlogy)

^○Tomohide Mukogawa, Yousuke Iwasa, Kohei Fukuoka, Naoki Kamitani, Masanori Matsusaka, Saiho Ko, Hirofumi Ishikawa, Akihiko Watanabe (Dept. of Surgery, Nara Prefecture General Medical Center, Japan)

^○Masashi Yamakawa, Daisuke Kumaki, Akira Sakamaki, Yukio Aruga, Masaaki Hirano (Niigata Prefectural Central Hospital, Japan)