1. Report of the International Workshop on Screening for Breast Cancer;Fletcher;J Natl Cancer Inst,1993
2. Periodic breast cancer screening in seven foreign countries;Shapiro;Cancer,1992
3. The Swedish two-county trial of mammographic screening for breast cancer: recent results and calculation of benefit;Tabar;J Epidemiol Community Health,1989
4. Canadian National Breast Screening Study, 1: breast cancer detection and death rates among women ages 40 to 49 years;Miller;Can Med Assoc J,1992