Iwate Health Administration Center, Iwate Prefectural Cancer Society(IPCS)/Department of Gastroenterology(DGE), School of Medicine, Iwate Medical University(IMU)/Department of Gastroenterology(DGE), School of Medicine, Iwate Medical University(IMU)/Department of Gastroenterology(DGE), School of Medicine, Iwate Medical University(IMU)/Iwate Health Administration Center, Iwate Prefectural Cancer Society(IPCS) (At 2015-06)