TY - JOUR A1 - Madigan, M. Patricia A1 - Ziegler, Regina G. A1 - Benichou, Jacques A1 - Byrne, Celia A1 - Hoover, Robert N. T1 - Proportion of Breast Cancer Cases in the United States Explained by Well-Established Risk Factors Y1 - 1995 DO - 10.1093/jnci/87.22.1681 JF - Journal of the National Cancer Institute VL - 87 IS - 22 SP - 1681 EP - -1685 ER -