^○Takashi Ibuka, Hiroshi Araki, Masahito Shimizu (Dept. of Gastroenterology, Gifu University School of Medicine, Gifu, Japan)

^○Sho Suzuki, Takuji Gotoda, Fuminori Moriyasu (Dept. of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan)

^○Shinwa Tanaka¹, Takashi Toyonaga¹, Yoshinori Morita² (1.Dept. of Endoscopy, Kobe University Hospital, Hyogo, Japan, 2.Division of Gastroenterology, Department of Internal Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan)

^○Yosuke Tsuji^1,2, Mitsuhiro Fujishiro^1,2, Kazuhiko Koike² (1.Dept. of Endoscopy and Endoscopic Surgery, Graduate School of Medicine, The University of Tokyo, Japan, 2.Department of Gastroenterology, Graduate School of Medicine, the University of Tokyo)

^○Toshio Uraoka^1,2, Osamu Goto², Naohisa Yahagi² (1.Dept. of Gastroenterology, National Hospital Organization Tokyo Medical Center, Tokyo, Japan, 2.Division of Research and Development for Minimally Invasive Treatment, Cancer Center School of Medicine, Keio University, Tokyo, Japan)

^○Satoru Hashimoto¹, Masaaki Kobayashi¹, Shuji Terai² (1.Dept. of Endoscopy, Niigata University Medical and Dental Hospital, Niigata, Japan, 2.Div. of Gastroenterology and Hepatology, Niigata University Medical and Dental Hospital, Niigata, Japan)

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

^○Kouichi Nonaka¹, Ken Ohata¹, Masahiko Murakami² (1.Dept. of Gastroenterology, NTT Medical Center Tokyo, Japan, 2.Gastroenterological and General Surgery, Showa University Hospital, Tokyo, Japan)

^○Hisatomo Ikehara¹, Toshihiro Okada², Hiroto Miwa¹ (1.Div. of Gastroenterology, Hyogo College of Medicine, Japan, 2.Department of Surgery, Hyogo College of Medicine)

^○Yoshimasa Miura, Yuji Ino, Yoshikazu Hayashi (Div. of Gastroenterology, Deptment of Internal Medicine, Jichi Medical University, Tochigi, Japan)

^○Nobukazu Yorimitsu, Tsuneo Oyama, Akiko Takahashi (Dept. of Endoscopy, Saku Centaral Hospital Advanced Care Center , Japan)

^○Kengo Takimoto, Dai Tamaki, Yosuke Fujinaga (Dept. of Gastroenterology, Takeda General Hospital, Kyoto, Japan)

^○Makomo Makazu¹, Kingo Hirasawa¹, Shin Maeda² (1.Div. of Endoscopy, Yokohama City University Medical Center, Yokohama, Japan, 2.Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan)

^○Maki Ayaki, Hirohito Mori, Hideki Kobara (Dept. of Gastroenterology and Neurology,Kagawa Univ,Kagawa,Japan)