1. Acheson ED, Gardner MJ, Pippard EC, Grime LP (1982) Mortality of two groups of women who manufactured gas masks from chrysotile and crocidolite asbestos: a 40-year follow up. Br J Indust Med 39: 344–348
2. Annegers JF, Strom H, Decker DG, Dockerty MB, O’Fallon WM (1979) Ovarian cancer. Incidence and case-control study. Cancer 43: 723–729
3. Beral V, Fraser P, Chilvers C (1978) Does pregnancy protect against ovarian cancer? Lancet I: 1083–1087
4. Berg JW, Baylor SM (1973) The epidemiologic pathology of ovarian cancer. Hum Pathol 4: 537–547
5. Byers T, Marshall J, Graham S, Mettlin C, Swanson M (1983) A case-control study of dietary and non-dietary factors in ovarian cancer. J Natl Cancer Inst 71: 681–686