title: The false negative smear: an instrumental error?
mesh_terms: D002278:Carcinoma in Situ / Q000473:pathology; D002584:Cervix Uteri / Q000166:cytology*; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D013048:Specimen Handling; D002578:Uterine Cervical Dysplasia / Q000473:pathology; D002583:Uterine Cervical Neoplasms / Q000473:pathology; D014626:Vaginal Smears / Q000295:instrumentation*