Silver Book Fact
In the U.S., men have a less than 1 in 2 lifetime risk of developing cancer; the risk is a little more than 1 in 3 for women.
American Cancer Society. Cancer Facts & Figures 2008. Atlanta, GA: American Cancer Society; 2008. http://www.cancer.org/acs/groups/content/@nho/documents/document/2008cafffinalsecuredpdf.pdf