1. Centers for Disease Control and Prevention. Human papillomavirus (HPV): Genital HPV infection - Fact sheet; 2019 [cited 2020 July 11]; Available from: http://www.cdc.gov/std/HPV/STDFact-HPV.htm.
2. Centers for Disease Control and Prevention. Human papillomavirus (HPV): HPV diseases and cancers; 2019 [cited 2020 July 11]; Available from: https://www.cdc.gov/hpv/parents/cancer.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fhpv%2Fcancer.html.
3. Centers for Disease Control and Prevention. Cervical cancer: Cervical cancer statistics; 2019 [cited 2020 July 11]; Available from: https://www.cdc.gov/cancer/cervical/statistics/index.htm.
4. Centers for Disease Control and Prevention. Vaginal and vulvar cancers: Vaginal and vulvar cancer statistics; 2020 [cited 2020 July 11]; Available from: https://www.cdc.gov/cancer/vagvulv/statistics/index.htm.
5. American Cancer Society. Penile cancer: What are the key statistics about penile cancer? 2019 [cited 2019 September 11]; Available from: http://www.cancer.org/cancer/penilecancer/detailedguide/penile-cancer-key-statistics.