1. Cervical cancer: estimated incidence mortality and prevalence worldwide in 2012. Globacan 2012. “ http://globocan.iarc.fr/old/FactSheets/cancers/cervix-new.asp . Accessed 5 Dec 2015.
2. Howley PM, Lowry DR. Papillomaviruses. In: Knipe DM and Howley PM editors Fields virology. Philadelphia: Lippincott, Williams and Wilkins; 2007. p. 2299-354
3. Trottier H, Burchell AN. Epidemiology of mucosal human papillomavirus infection and associated diseases. Public Health Genomics. 2009;12:291–307.
4. Bouvard V, Baan R, Straif K, Grosse Y, Secretan B, et al. A review of human carcinogens–Part B: biological agents. Lancet Oncol. 2009;10:321–2.
5. Guan P, Howell-Jones R, Li N, Bruni L, et al. Human papillomavirus types in 115,789 HPV-positive women: A meta-analysis from cervical infection to cancer Int. J Cancer. 2012;131:2349–59.