1. 1. American Cancer Society . Cancer Facts and Figures 2005 . Atlanta, Ga: American Cancer Society; 2005 . Available at: http://www.cancer.org/downloads/STT/CAFF2005f4PWSecured.pdf. Accessed August 31, 2005.
2. How much melanoma is caused by sun exposure?
3. 4. National Cancer Institute . What you need to know about skin cancer . Bethesda, Md: National Cancer Institute, National Institutes of Health; 2005. Available at: http://www.nci.nih.gov/cancertopics/wyntk/skin/page5. Accessed July 26, 2005.