1. Anonymous (1998) The screening muddle. Lancet 351: 459
2. Beral V, Hermon C, Munoz N, Devesa SS (1994) Trends in cancer incidence and mortality. Cancer Surv 19/20: 265–285
3. Berget A (1979) Influence of population screening on morbidity and mortality of cancer of the uterine cervix in Maribo Amt. Dan Med Bull 26: 91–100
4. Central Cancer Registry (1993) Overview of incidence of carcinoma of the cervix uteri in Friesland, Rotterdam, and The Hague in the years 1960–1970. Koningin Wilhelmina Fonds.
5. Clarke EA, Anderson TW (1979) Does screening by ‘Pap’ smears help prevent cervical cancer? A case–control study. Lancet 2: 1–4