1. Cervical cancer, human papillomavirus (HPV), and HPV vaccines—Key points for policy-makers and health professionals,2007
2. Global cancer statistics, 2002;DM Parkin;CA Cancer J Clin,2005
3. A systematic review of the prevalence and attribution of human papillomavirus types among cervical, vaginal, and vulvar precancers and cancers in the United States;RP Insinga;Cancer Epidemiol Biomarkers Prev,2008
4. Global burden of human papillomavirus and related diseases;D Forman;Vaccine,2012
5. Bruni L, Barrionuevo-Rosas L, Albero G, Serrano B, Mena M, Gómez D, et al. Human Papillomavirus and Related Diseases in the World. Summary Report 27 July 2017 [Internet]. ICO Information Centre on HPV and Cancer (HPV Information Centre); 2017. Available: http://www.hpvcentre.net/statistics/reports/XWX.pdf