1. Bray, F., Ferlay, J., Soerjomataram, I., Siegel, R. L., Torre, L. A., & Jemal, A. (2018). Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA: A Cancer Journal for Clinicians, 68(6), 394–424.
2. Castle, P. E., & Maza, M. (2015). Prophylactic HPV vaccination: past, present, and future. Epidemiology and Infection, 2, 1–20.
3. CDC. (2018) Human papillomavirus (HPV) vaccines. National Cancer Institute. Retrieved from: https://www.cancer.gov/about-cancer/causes-prevention/risk/infectious-agents/hpv-vaccine-fact-sheet.
4. Kavanagh, K., Pollock, K. G., Cuschieri, K., Palmer, T., Cameron, R. L., Watt, C., et al. (2017). Changes in the prevalence of human papillomavirus following a national bivalent human papillomavirus vaccination programme in Scotland: A 7-year cross-sectional study. The Lancet Infectious Diseases, 17(12), 1293–1302. https://doi.org/10.1016/S1473-3099(17)30468-1.
5. WHO. (2014). WHO | Comprehensive cervical cancer control. Retrieved March 3, 2016, from https://www.who.int/cancer/publications/cervical-cancer-guide/en/.