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A good alternative to having a colonoscopy? Maybe not
A good alternative to having a colonoscopy? Maybe not

There are few medical tests with as high a squirm factor as colonoscopies. So anyone who comes along with a simple, non-invasive alternative is probably going to make a lot of money. If the alternative test is any good. A Wisconsin company called Exact Sciences has launched a marketing campaign for its new product, Cologuard, which it hails as "the breakthrough test for colon cancer screening that's as easy as going to the bathroom." Although stool tests have been around for a while, Cologuard is the first to use a person's DNA, rather than blood, to spot tumors. It was approved this month by the Food and Drug Administration. Here's the thing, though: Exact...

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