2. American Cancer Society. Cancer facts and figures 2009. Atlanta, Ga.: American Cancer Society; 2009. http://www.cancer.org/downloads/ STT/500809web.pdf. Accessed March 26, 2010.
3. Horner MJ, Ries LAG, Krapcho M, et al., eds. SEER cancer statistics review, 1975-2006. Bethesda, Md.: national Cancer Institute; 2009. http://seer.cancer.gov/csr/1975_2006. Accessed March 26, 2010.
4. American Cancer Society. overview: breast cancer. Survival rates for breast cancer. http://www.cancer.org/docroot/CRI/content/CRI_2_2_ 3X_Survival_rates_for_breast_cancer_5.asp. Accessed April 8, 2010.
5. Breast. In: Greene FL, Page DL, Fleming ID, et al., eds. AJCC Cancer Staging Manual. 6th ed. new York, nY: Springer-Verlag; 2002:223-240.
6. U.S. Preventive Services Task Force. Chemoprevention of breast cancer: recommendations and rationale. Rockville, Md.: Agency for Healthcare Research and Quality; July 2002. http://www.ahrq.gov/clinic/3rduspstf/ breastchemo/breastchemorr.htm. Accessed February 8, 2010.