1. Surveillance, epidemiology and end results. 2011. Available at: http://www.seer.cancer.gov/. Accessed November 1, 2014.
2. Cost of nonmelanoma skin cancer treatment in the United States;Chen;Dermatol Surg,2001
3. Skin cancer facts. 2012. Available at: http://www.skincancer.org/skin-cancer-facts. Accessed November 1, 2014.
4. Skin cancer is among the most costly of all cancers to treat for the Medicare population;Housman;J Am Acad Dermatol,2003
5. Sun exposure, sun protection, and vitamin D;Robinson;JAMA,2005