Kawamura T, Inoue T, Shinomiya R, Sakai H, Amamiya K, Sakiyama N, Shirakawa A, Okada Y, Sanada K, Nakase K, Mandai K, Suzuki A, Kamaguchi M, Morita A, Nishioji K, Tanaka K, Uno K, Yokota I, Kobayashi M ,Yasuda K. Significance of fecal hemoglobin concentration for predicting risk of colorectal cancer after colonoscopy. JGH Open. [Epub ahed of print]