1. Ferlay JF, Soerjomataram I, Ervik M, Dikshit R, Eser S, Mathers C, et al. GLOBOCAN 2012 v1.0. Cancer Incidence and Mortality Worldwide: IARC CancerBase No. 11 [Internet]. Lyon: IARC; 2013.
2. Forman D, Bray F, Brewster DH, Gombe Mbalawa C, Kohler B, Pineros M, et al. Cancer Incidence in Five Continents, Vol. X (electronic version). Lyon: IARC; 2013.
3. Syrjanen S, Lodi G, von B I, Aliko A, Arduino P, Campisi G, et al. Human papillomaviruses in oral carcinoma and oral potentially malignant disorders: a systematic review. Oral Dis. 2011;17 Suppl 1:58–72.
4. Jayaprakash V, Reid M, Hatton E, Merzianu M, Rigual N, Marshall J, et al. Human papillomavirus types 16 and 18 in epithelial dysplasia of oral cavity and oropharynx: a meta-analysis, 1985–2010. Oral Oncol. 2011;47(11):1048–54.
5. Ries LAG, Melbert D, Krapcho M, Stinchcomb DG, Howlader N, Horner MJ. Cancer statistics review, 1975–2005. Bethesda: National Cancer Institute; 2008. Based on November 2007 SEER data submission, posted to the SEER web site. http://seer.cancer.gov/csr/1975_2005.