American Society of Clinical Oncology. Penile Cancer: Risk Factors and Prevention. 8/2017. Accessed at www.cancer.net/cancer-types/penile-cancer/risk-factors-and-prevention on May 25, 2018.
Douglawi A, Masterson TA. Updates on the epidemiology and risk factors for penile cancer. Transl Androl Urol. 2017;6(5):785-790.
StatPearls. Engelsgjerd JS, LaGrange CA. Cancer, Penile. Accessed at www-ncbi-nlm-nih-gov.proxy.library.emory.edu/books/NBK499930/ on May 25, 2018.