TY - JOUR AU - Boyd, N F; Guo, H; Martin, L J TI - Mammographic Density and the Risk and Detection of Breast Cancer JO - N Engl J Med VL - 356 PY - 2007 DO - 10.1056/NEJMoa062790 L3 - PubMed-ID: 17229950 SP - 227 EP - 236 N1 - et al. ER -