^○Fumiaki Ishibashi, Shinei Kudo, Masashi Misawa (Digestive Disease Center, Showa University Northern Yokohama Hospital, Kanagawa, Japan)

^○Toyoki Kudo¹, Shinei Kudo¹, Kunihiko Wakamura¹, Yuichi Mori¹, Masashi Misawa¹, Katsuro Ichimasa¹, Hiroki Nakamura¹, Takemasa Hayashi¹, Hideyuki Miyachi¹, Fumio Ishida¹, Haruhiro Inoue² (1.Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan, 2.Digestive Disease Center, Showa University Koto-Toyosu Hospital, Tokyo, Japan)

^○Shigetomi Tanaka, Masaya Ishida, Tomo Kagawa, Sakiko Kuraoka, Ichiro Sakakihara, Kumiko Yamamoto, Koichi Izumikawa, Sakuma Takahashi, Mihoko Matsuura, Shigenao Ishikawa, Masaki Wato, Toshimi Hasui, Tomoki Inaba (Dept. of Gastroenterology, Kagawa Prefectural Central Hospital, Japan)

^○Yoko Kominami¹, Shigeto Yoshida², Kazuaki Chayama¹ (1.Dept. of Gastroenterology and Metabolism, Graduate School of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan, 2.Department of Endoscopy and Medicine, Graduate School of Biomedical and Health Science, Hiroshima University, Hiroshima, Japan)

^○Masanori Sekiguchi, Eriko Tsuruki, Seiichiro Abe, Yutaka Saito (Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan)