^○Maki Bunno, Kazuyuki Nakazawa (Dept. of Gastroenterology,Koyo Hospital,Wakayama,Japan)

^○Yuki Fujii¹, Masahiro Nakagawa², Motowo Mizuno¹ (1.Hiroshima City Hospital,Dept. of Internal Medicine,Hiroshima,Japan, 2.Hiroshima City Hospital,Department of Endoscopy,Hiroshima,Japan)

^○Osamu Sugita, Takuto Suzuki, Taro Hara, Rino Nankinzan, Hiroyuki Arai, Emiri Kita, Yoshiyasu Kitagawa, Akiko Tsujimoto, Nami Nakamura, Nei Soma, Kentaro Sudo, Kazuyoshi Nakamura, Keiko Minashi, Shuichi Hironaka, Tadamichi Denda, Taketo Yamaguchi (Chiba Cancer Center, Chiba, Japan)

^○Ko Watanabe¹, Takuto Hikichi¹, Jun Nakamura², Tadayuki Takagi², Rei Suzuki², Mitsuru Sugimoto², Hitomi Kikuchi², Naoki Konno², Yuichi Waragai², Mika Takasumi², Hiromasa Ohira², Katsutoshi Obara¹ (1.Dept. of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan, 2.Department of Gastroenterology and Rheumatology School of Medicine, Fukushima Medical University,)

^○Masaaki Hirano, Yukio Aruga, Masashi Yamakawa, Daisuke Kumaki, Akira Sakamaki (Niigata Prefectural Central Hospital, Dept. of Internal Medicine,Joetsu, Japan)