1. The Oral Cancer Foundation. The Oral Cancer Foundation. http://oralcancerfoundation.org. Accessed August 17, 2016.
2. Oral cavity and oropharyngeal cancer. American Cancer Society. http://www.cancer.org/acs/groups/cid/documents/webcontent/003128-pdf.pdf. Revised November 9, 2016. Accessed November 21, 2016.
3. Nasopharyngeal cancer. American Cancer Society. http://www.cancer.org/acs/groups/cid/documents/webcontent/003124-pdf.pdf. Revised August 8, 2016. Accessed November 21, 2016.
4. Laryngeal and hypopharyngeal cancers. American Cancer Society. http://www.cancer.org/acs/groups/cid/documents/webcontent/003108-pdf.pdf. Revised August 8, 2016. Accessed November 21, 2016.
5. Sinonasal malignancy/skull base surgery. American Head & Neck Society. http://www.ahns.info/resources/education/patient_education/skullbase. Accessed August 17, 2016.