1. Cancer incidence and mortality in Europe;Levi;Soz Praventivmed,1989
2. Descriptive epidemiology of colorectal cancer;Boyle;Int J Cancer,1985
3. Diet and cancer;Byers,1988
4. Reproduction, endogenous and exogenous sex hormones, and colon cancer: a review and hypothesis;McMichael;J Natl Cancer Inst,1980
5. Reproductive and menstrual factors and risk of colorectal cancer;Negri;Cancer Res,1989