1. National Cancer Institute. Genetics of Skin Cancer (PDQ) http://www.cancer.gov/cancertopics/pdq/genetics/skin/HealthProfessional/page4/ 2013
2. Cancer statistics, 2013;Siegel;CA Cancer J Clin,2013
3. Howlader N Noone , AM Krapcho M http://seer.cancer.gov/csr/1975_2010/ 2013