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Simple blood test to reveal cancer at low levels

CBS News, January 4, 2011
Harvard University medical researchers are developing a new test to make monitoring cancer in patients easier and more accurate. Those researchers have joined forces with healthcare giant Johnson & Johnson to bring the tests to the market. Researchers believe a new test being developed at Massachusetts General Hospital Cancer Center - using just a teaspoon of blood - may be able to detect cancer before it shows up on scans.