The tool takes into account current age 35 to 74 years, race ethnicity white, black, Hispanic, Asian, Native American, other multiple races, unknown, first degree family history of breast cancer yes, no, unknown, prior benign breast biopsy none, prior biopsy with unknown diagnosis, nonproliferative lesion, proliferative changes with or without atypia, and LCIS, and mammographic density almost entirely fatty, scattered fibroglandular densities, heterogeneously dense, and extremely dense how to buy cialis