| http://www.w3.org/ns/prov#value | - Amy B. Knudsen, Ph.D., of the Institute for Technology Assessment at Massachusetts General Hospital, and colleagues, used three different simulation models to calculate the lifetime costs and life expectancy associated with 15 screening strategies, including no screening, CTC screening every five years, annual fecal occult blood test (FOBT), flexible sigmoidoscopy every five years, flexible sigmoi
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