ARIMA Hiromi¹, NOZAKI Ryoichi², MATSUMOTO Tetsuya¹, TAKANO Shota³, YAMADA Kazutaka⁴ (1.Department of Radiological Technology, Coloproctology Center Takano Hospital, 2.Department of Gastroenterogy, Coloproctology Center Takano Hospital, 3.Department of Functional Anorectal Disoder, Coloproctology Center Takano Hospital, 4.Department of Gastroenterogical Surgery, Coloproctology Center Takano Hospital)

MATSUMOTO Kazuhisa¹, KAWAKAMI Tomohiro¹, NIIDA Suguru¹, ISHIMOTO Hiroki¹, SHIMAZAKI Hiroshi², SUGIYAMA Kouhei³, MIYAKAWA Maki³, NASUNO Masanao³, TANAKA Hiroki³, MOTOYA Satoshi³ (1.Department of Radiological Technology, Hokkaido P.W.F.A.C. Sapporo-Kosei General Hospital, 2.Department of Radiological Technology, Hokkaido P.W.F.A.C. Engaru-Kosei General Hospital, 3.IBD center, Hokkaido P.W.F.A.C. Sapporo-Kosei General Hospital)

KUNISAKI Reiko¹, KUMA Nao¹, HASHIMOTO Yu¹, NAKAMORI Yoshinori¹, MADARAME Akira¹, IKEDA Aya¹, HIRAYAMA Atsuhiro¹, KIMURA Hideaki¹, SAIGUSA Yusuke², NUMATA Kazushi³ (1.Inflammatory Bowel Disease Center, Yokohama City University Medical Center, 2.Department of Biostatistics and Epidemiology, Graduate School of Medicine, Yokohama City University, Yokohama, 3.Gastroenterological Center, Yokohama City University Medical Center)

KATSURADA Takehiko¹, KINOSHITA Kenji², NISHIDA Mutsumi^{3, 4}, OMOTEHARA Satomi^{3, 4}, ONISHI Reizo¹, MAEMOTO Atsuo⁵, ETO Kazunori⁶, YOSHII Shinji⁷, YAMAMOTO Junji⁸, SAKAMOTO Naoya¹ (1.Division of Gastroenterology and Hepatology, Hokkaido University Hospital, 2.Department of Gastroenterology, Hakodate Municipal Hospital, 3.Division of Laboratory and Transfusion Medeicine, Hokkaido University Hospital, 4.Diagnostic Center for Sonography, Hokkaido University Hospital, 5.Inflammatory Bowel Disease Center, Sapporo Higashi Tokushukai Hospital, 6.Department of Gastroenterology, Tomakomai City Hospital, 7.Department of Gastroenterology, Sapporo Medical Center NTT EC, 8.Department of Gastroenterology, Ohguro Gastroenterological Hospital)

TOYODA Hideki, TOYODA Mika (Gastroenterology, Happy-GI-Clinic)

MANABE Noriaki¹, HATA Jiro¹, NAKATO Rui¹, FUJITA Minoru¹, IMAMURA Hiroshi¹, KUSUNOKI Hiroaki², HARUMA Ken³ (1.Division of Endoscopy and Ultrasonography, Department of Clinical Pathology and Laboratory Medicine, Kawasaki Medical School, 2.Department of General Medicine, Kawasaki Medical School, 3.Department of General Internal Medicine 2, Kawasaki Medical School)