1. National Cancer Institute. Cancer stat facts: oral cavity and pharynx cancer. Available at: https://seer.cancer.gov/statfacts/html/oralcav.html. Accessed August 25, 2019.
2. The impact of human papillomavirus on cancer risk in penile cancer;Reis,2012
3. Memorial Sloan Kettering Cancer Center. Head & neck cancers. Available at: https://www.mskcc.org/cancer-care/types/head-neck. Accessed August 25, 2019.
4. National Cancer Institute. Head and neck cancers. Available at: https://www.cancer.gov/types/head-and-neck/head-neck-fact-sheet. Accessed August 25, 2019.
5. Oropharyngeal candidiasis in head and neck cancer patients treated with radiation: update 2011;Bensadoun;Support Care Cancer,2011