^○Shigeto Yoshii, Shigeru Kanaoka, Yasushi Iwaoka (Dept.Of Gastroenterology, Hamamatsu Medical Center, Hamamatsu, Japan)

^○tomoaki karube (Karube Hospital, Ibaraki, Japan)

^○Takahiro Kozu (Toyosu Cubic Garden Kozu Clinic, Japan)

^○Mika Yuki, Yoshinori Komazawa, Yoshiya Kobayashi (Div. of Internal Medicine, Izumo-City General Medical Center, Shimane, Japan)

^○Shuji Kitaoka, Manabu Wada, Norihiko Watanabe (Div. of Gatroenterology,KKR Hirakata Kousai Hospital)

^○Kazu Hamada, Ken Kawaura, Tohru Itoh (Dept. of Gastroenterological Endoscopy, Sch. of Med. Kanazawa Medical Univ., Ishikawa, Japan)

^○Kenjiro Morishige, Akiko Chino, Masahiro Igarashi (Cancer Institute Hospital,Dept. of Gastroenterology, Japan)

^○Yuichiro Kuroki, Kunio Asonuma, Hiroshi Takahashi (Div. of Gastroenterology, Showa University Fujigaoka Hospital, Kanagawa, Japan)

^○Kenji Yamauchi, Nobuto Hirata, Mitsuru Hirai (Kameda Medical Center, Dept. of Gastroenterology , Japan)

^○Kazutomo Togashi, Kenichi Utano, Daiki Nemoto (Dept. of Coloproctology, Aizu Med. Center, Fukushima Med. Univ., Fukushima, Japan)

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

^○Keiko Ishikawa¹, Shin Arai², Shomei Ryozawa² (1.Tokorozawa Municipal Medical Center, Saitama, Japan, 2.Saitama Medical University International Medical Center)