1. Siegel R, Naishadham D, Jemal A (2012) Cancer statistics, 2012. CA Cancer J Clin 62(1):10–29
2. Malvezzi M, Bertuccio P, Levi F et al (2013) European cancer mortality predictions for the year 2013. Ann Oncol 24(3):792–800
3. American Cancer Society (2012) Cancer facts & figures. Atlanta, American Cancer Society
4. Altekruse SF, Kosary CL, Krapcho M, et al. SEER Cancer Statistics Review (1975–2007) National Cancer Institute, Bethesda, MD. http://seer.cancer.gov/csr/975_2007/ based on Nov 2009 SEER data submission, posted to the SEER website, 2010. Accessed 24 Feb 2013
5. Health Service, Centers for Disease Control and Prevention, Washington, DC, 2010. Smoking and tobacco use – fact sheets. http://www.cdc.gov/tobacco/data_statistics/fact_sheets/ . Accessed 24 Feb 2013