An Investigation of Interactions Between Genetic Variants and Established Risk Factors for Breast Cancer in the NCI Breast and Prostate Cancer Cohort Consortium (BPC3) - Campa, D; Kaaks, R; Le Marchand, L; Haiman, C; Travis, R; Ziegler, R; Hunter, D; Lindstroem, S; Canzian, F (2012)