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Blood Test to Detect 8 Cancers Early Gives Promising Results

Scientists are reporting progress on a blood test to detect many types of cancer at an early stage, including some of the most deadly ones that lack screening tools now.  Many groups are working on liquid biopsy tests, which look for DNA and other things that tumors shed into blood, to try to find cancer before it spreads, when chances of cure are best.  In a study Thursday in the journal Science, Johns Hopkins University scientists looked to see how well their...

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