1. Centers for Disease Control and Prevention. HPV Vaccination. Available from: http://www.cdc.gov/vaccines/vpd-vac/hpv/. Accessed 1 September 2015
2. Cancer Incidence and Mortality Worldwide: IARC CancerBase No. 11.;Ferlay,2013
3. Epidemiology of oral cancer;Johnson,2015
4. Global oral health inequalities in incidence and outcomes for oral cancer: causes and solutions;Johnson;Adv Dent Res,2011
5. Squamous cell carcinoma and precursor lesions: diagnosis and screening in a technical era;Poh;Periodontology,2000