Barnett Kramer, M.D., M.P.H, directs NCI’s Division of Cancer Prevention. In May 2012, he sat down to explain the results of the Prostate, Lung, Colorectal and Ovarian Cancer Trial, the largest cancer screening trial ever performed in the United States. The four common cancers studied collectively account for almost 45 percent of cancer-related deaths in the U.S.
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