1. American Cancer Society, Available at: http://www.cancer.org/Cancer/BreastCancer/OverviewGuide/breast-cancer-overview-key-statistics . Accessed 30 March 2013
2. Gøtzsche PC, Nielsen M (2009) Screening for breast cancer with mammography. Cochrane Database Syst Rev 4:1
3. Center for Disease Control and Prevention, The National Breast and Cervical Cancer Early Detection Program, Available at: http://www.cdc.gov/cancer/nbccedp . Accessed March 2013
4. American Cancer Society web site. Available at: http://www.cancer.org/healthy/findcancerearly/cancerscreeningguidelines/american-cancer-society-guidelines-for-the-early-detection-of-cancer . Accessed 25 May 2013
5. The US Preventive Services Task Forces. Available at: http://www.uspreventiveservicestaskforce.org/uspstf/uspsbrca.htm . Accessed 25 May 2013