1. The annual Pap test: a dubious policy success;Foltz;Millbank Mem Fund Quart,1978
2. Evaluation of the impact of screening for cancer of the cervix;Miller,1986
3. Cervical smears: a questionable practice?;McCormick;Lancet,1989
4. Cervical cancer diagnosed after negative results on cervical cytology: perspective in the 1980s;Mitchell;Br Med J,1990
5. Value of duplicate smears in cervical cytology;Davis;Acta Cytol,1981