Data reprinted in Breslow, N. E., and N. E. Day. 1980. Statistical Methods in Cancer Research: Vol. 1 -- The Analysis of Case-Control Studies. Lyon: IARC.
Data from Mack, T. M., M. C. Pike, B. E. Henderson, R. I. Pfeffer, V. R. Gerkins, M. Arthur, and S. E. Brown. 1976. Estrogens and endometrial cancer in a retirement community. New England Journal of Medicine 294: 1262-1267. https://doi.org/10.1056/NEJM197606032942304.