SATO Ai^{1, 2}, IRISAWA Atsushi^{1, 3}, SHIBUKAWA Goro¹ (1.Gastroenterology, Fukushima Medical University Aizu Medical Center, 2.Gastroenterology, Dokkyo Medical University, 3.Gastroenterology, Dokkyo Medical University)

SATO Takamitsu, HOSONO Kunihiro, KATO Shingo, HASEGAWA Sho, KURITA Yuusuke, KUBOTA Kensuke, NAKAJIMA Atsushi (Department of Gastoenterology and Hepatology, Yokohama City University Hospital)

YAMASHITA Yasunobu, HATAMARU Keiichi, KITANO Masayuki (Second Department of Internal Medicine, Wakayama Medical University)

ISHII Yasutaka, SERIKAWA Masahiro, TSUBOI Tomofumi, KAWAMURA Ryota, TSUSHIMA Ken, NAKAMURA Shinya, HIRANO Tetsuro, MORI Takeshi, IKEMOTO Juri, CHAYAMA Kazuaki (Department of Gastroenterology and Metabolism, Hiroshima University Hospital)

SUZUKI Hirotaka¹, HIROOKA Yoshiki², KAWASHIMA Hiroki¹, OHNO Eizaburo¹, ISHIKAWA Takuya¹, TANAKA Hiroyuki¹, SAKAI Daisuke¹, NISHIO Ryo¹, UETSUKI Kota¹, FUJISHIRO Mitsuhiro¹ (1.Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, 2.Department of Endoscopy, Nagoya University Hospital)

KOJIMA Hiroyuki, SUGIMOTO Katsutoshi, SOFUNI Atsushi, TSUCHIYA Takayoshi, ISHII Kentaro, TANAKA Reina, TONOZUKA Ryosuke, HONJO Mitsuyoshi, FUJITA Mitsuru, ITOI Takao (Department of gastroenterology and hepatology, Tokyo Medical University)

KOYA Toshinari¹, HIROOKA Yoshiki², KAWASHIMA Hiroki³, OHNO Eizaburou³, ISHIKAWA Takuya³ (1.Department of Gastroenterology and Hepatology, Tokai Central Hospital, 2.Department of Endoscopy, Nagoya University Hospital, 3.Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine)

IINO Yotaro, MARUYAMA Hitoshi, MIKATA Rintaro, YASUI Shin, KOROKI Keisuke, KOBAYASHI Kazuhumi, KIYONO Soichiro, SUGIYAMA Harutoshi, TSUYUGUCHI Toshio, KATO Naoya (Department of gastroenterology, Graduate school of Medicine, Chiba University)