Reyes, Juan Carlos, et al. “Demographic and High-Risk Behaviors Associated With HPV and HPV Vaccine Awareness Among Persons Aged 15-74 Years in Puerto Rico”. Puerto Rico Health Sciences Journal, vol. 34, no. 4, Nov. 2015, pp. 195-00, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1313.