A screening test for colon cancer that looks for ?invisible? blood in stool may also predict a heightened risk of premature death from other causes, a recent study suggests.Photo: Online 2A screening test for colon cancer that looks for... A screening test for colon cancer that looks for ?invisible? blood in stool may also predict a heightened risk of premature death from other causes, a recent study suggests.Photo: Online 2A screening test for colon cancer that looks for...
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