Centers for Disease Control and Prevention (2015) Genital HPV Infection—Fact Sheet.
 Centers for Disease Control and Prevention (2012) Human Papillomavirus-Associated Cancers—United States, 2004-2008. American Journal of Transplantation, 12, 1945-1949.
 Centers for Disease Control and Prevention (2012) HPV Vaccine Information for Young Women.
 Centers for Disease Control and Prevention (2015) CDC Vaccine Price List.
 Shew, M.L., Weaver, B., Tu, W., Tong, Y., Fortenberry, J.D. and Brown, D.R. (2013) High Frequency of Human Papillomavirus Detection in the Vagina before First Vaginal Intercourse among Females Enrolled in a Longitudinal Cohort Study. The Journal of Infectious Diseases, 207, 1012-1015.
 Munro, D. (2014) Annual US Healthcare Spending Hits $3.8 Trillion.