title: Testing of feces for occult blood: a review.
mesh_terms: D001560:Benzidines; D005189:False Positive Reactions; D005243:Feces / Q000032:analysis*; D006138:Guaiac; D006801:Humans; D008722:Methods; D009369:Neoplasms / Q000175:diagnosis; D009780:Occult Blood
chemical_list: D001560:Benzidines; D006138:Guaiac