1. Cancer facts and figures 2014,2014
2. Centers for Disease Control and Prevention. National Center for Health Statistics. National Vital Statistics Report. Deaths: final data for 2010. May 8, 2013; 61(04).
3. U.S. National Institutes of Health. National Cancer Institute. SEER Cancer Statistics Review, 1975-2010.
4. World Health Organization. Cancer. Fact Sheet No 297. January 2013.
5. World Health Organization. Tobacco. Fact Sheet No 339. May 2014.