title: Jaffe-Zierdt quantitative test for fecal hemoglobin questioned.
mesh_terms: D005188:False Negative Reactions; D006418:Heme / Q000032:analysis; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D009780:Occult Blood
chemical_list: D006454:Hemoglobins; D006418:Heme