SAN FRANCISCO - AUGUST 18: Minh To PhD loads DNA samples onto a gel while searching for variations in genetic samples that would point to someone's succeptibility to lung, prostate, breast and colo rectal cancer at the UCSF Comprehensive Cancer Center August 18, 2005 in San Francisco, California. The UCSF Comprehensive Cancer Center continues to use the latest research and technology to battle cancer and was recently rated 16th best cancer center in the nation by US News and World Report. (Photo by Justin Sullivan/Getty Images)
