title: Hidden factors in occult blood testing. Foods and medications can affect results.
authors.affiliation: Scripps Mercy Hospital, San Diego, CA, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Ahmed
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis / Q000209:etiology; D000328:Adult; D015982:Bias; D004032:Diet; D004358:Drug Therapy; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D009780:Occult Blood; D015203:Reproducibility of Results; D013048:Specimen Handling / Q000379:methods* / Q000592:standards