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"A single flexible sigmoidoscopy screening between the ages of 55-64 years is associated with a lower level of colorectal cancer (CRC) incidence and mortality, according to a study published online August 18 in the Journal of the National Cancer Institute."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2011-08-flexible-sigmoidoscopy-screening-colorectal-cancer.html>