SAN FRANCISCO - AUGUST 18: Dr. Edward Sickles MD (R) and Larisa Gurilnik RT look at films of breast x-rays 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)
CAMBRIDGE, UNITED KINGDOM - DECEMBER 09: A scientist examining cells in a 96-well plate. These plates allow scientists to look at lots of cells at the same time and directly compare cells that have or have not been treated with a drug, at the Cancer Research UK Cambridge Institute on December 9, 2014 in Cambridge, England. Cancer Research UK is the world's leading cancer charity dedicated to saving lives through research. Its vision is to bring forward the day when all cancers are cured. They have saved millions of lives by discovering new ways to prevent, diagnose and treat cancer, and as such the survival rate in the UK has doubled in the last 40 years. Cancer Research UK funds over 4,000 scientists, doctors and nurses across the UK, more than 33,000 patients who join clinical trials each year and a further 40,000 volunteers that give their time to support the work. (Photo by Dan Kitwood/Getty Images/Cancer Research UK)
390487 03: A view of a close up of a lung x-ray of a cigarette smoker in an undated photo. (Photo Courtesy of the American Cancer Society via Getty Images)
