title: Cervical cytology external and internal quality assurance: a comparative appraisal.
authors.affiliation: Trent Regional Health Authority, Sheffield.
authors.forename: D N
authors.initials: DN
authors.lastname: Slater
mesh_terms: D005188:False Negative Reactions; D005260:Female; D006801:Humans; D017056:Medical Laboratory Personnel; D011237:Predictive Value of Tests; D011361:Professional Competence; D011785:Quality Assurance, Health Care; D002577:Uterine Cervical Diseases / Q000473:pathology*; D014626:Vaginal Smears