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Tech and biotech: Madison firm puts tool for finding cancer to the test

Exact Sciences has begun a huge test of its non-invasive screening test for colorectal cancer. The Madison company started lining up patients on June 30 to take its DNA-based stool test. Over the next 12 to 15 months, Exact Sciences wants to test more than 10,000 patients between the ages of 50 and 84 at 60 sites around the U.S., including UW Hospital in Madison.