title: Regarding the validity of cytology proficiency testing.
authors.forename: S F
authors.initials: SF
authors.lastname: Cramer
mesh_terms: D003585:Cell Biology / Q000193:education*; D004521:Educational Measurement / Q000379:methods*; D006801:Humans; D015588:Observer Variation; D010340:Pathology, Surgical / Q000193:education*; D015203:Reproducibility of Results