^○Katsuro Ichimasa, Shinei Kudo, Hideyuki Miyachi (Digestive Disease Center, Showa Univercity Northern Yokohama Hospital, Yokohama, Japan)

^○Yuji Inoue, Ryosuke Nakagawa, Masakazu Yamamoto (Institute of Gastroenterology, Tokyo Women'S Medical University, Japan)

^○Masahiro Tajika, Tsutomu Tanaka, Yasumasa Niwa (Dept. of Endoscopy, Aichi Cancer Center Hospital, Nagoya, Japan)

^○Toshihiro Kusaka, Shigehiko Fujii, Hiroyuki Kokuryu (Dept. of Gastroenterology & Hepatology, Digestive Disease Center, Kyoto Katsura Hosp. Kyoto, Japan)

^○Katsunari Takifuji, Tsukasa Hotta, Hiroki Yamaue (2Nd Dept. of Surgery, Sch. of Med. Wakayama Medical Univ., Wakayama, Japan)

^○Shinya Yamada, Shigetsugu Tsuji, Hisashi Doyama (Div. of Gastroenterology, Ishikawa Prefectural Central Hospital,Ishikawa, Japan)

^○Yuzuru Tamaru¹, Shinji Tanaka¹, Kazuaki Chayama² (1.Dept. of Endoscopy, Hiroshima University Hospital, Hiroshima, Japan, 2.Department of Gastroenterology and Metabolism, Hiroshima University Hospital, Hiroshima, Japan)

^○Seiichiro Abe, Taku Sakamoto, Yutaka Saito (Endoscopy Division, National Cancer Center Hostpital, Tokyo, Japan)

^○Toshifumi Mitani, Shu Hoteya, mitsuru Kaise (Dept. of Gastroenterology, Toranomon Hospital, Tokyo, Japan)

^○Yasutoshi Ochiai¹, Toshio Uraoka^1,2, Naohisa Yahagi¹ (1.Div. of Research and Development For Minimally Invasive Treatment, Cancer Center, Keio University Sch. of Med., Tokyo, Japan, 2.Department of Gastroenterology, National Hospital Organization Tokyo Medical Center, Tokyo)

^○Tsukasa Ishida¹, Takashi Toyonaga², Yoshinori Morita¹ (1.Div. of Gastroenterology, Dept. of Internal Medicine, Grad. Sch. of Med. Kobe Univ., Kobe, Japan, 2.Dept. of Endoscopy, Grad Sch. of Med. Kobe Univ., Kobe, Japan)

^○Suketo So¹, Motochika Yasaka¹, Yosuke Morimitsu² (1.Dept. of Gastroenterology, Tobata Kyoritsu Hospital,Kitakyushu,Japan, 2.Department of Pathology, Tobata Kyoritsu Hospital,Kitakyushu,Japan)