Oral Cancer Foundation, "Oral Cancer Facts," http://oralcancerfoundation.org/facts/index.htm (accessed January 21, 2010)

WebMD, "Oral Cancer," http://www.webmd.com/oral-health/guide/oral-cancer (accessed January 21, 2010)

OmniMedicalSearch.com, "Oral Cancer: Causes and Risk Factors," http://www.omnimedicalsearch.com/conditions-diseases/oral-cancer-causes-risk-factors.html (accessed January 22, 2010)

University of Maryland Medical Center, "Oral Health: Oral Cancer," http://www.umm.edu/oralhealth/cancer.htm (accessed January 22, 2010)

American Cancer Society, "What are the Risk Factors for Oral Cavity and Oropharyngeal Cancers?" http://www.cancer.org/docroot/CRI/content/CRI_2_4_2X_What_are_the_risk_factors_for_oral_cavity_and_oropharyngeal_cancer_60.asp (accessed February 9, 2010)