1. Quality control;Allen,1992
2. A comprehensive internal quality control system for a large cytology laboratory;Anderson;Acta Cytol,1997
3. Quality assurance in cytopathology: Recommendations and ongoing quality assurance activities of the American Society of Clinical Pathologists;Bonfiglio;Acta Cytol,1989
4. Quality control in cytopathology;Erozan;Clin Lab Med,1986
5. False-negative results in cervical cytologic studies;Gay;Acta Cytol,1985