| http://www.w3.org/ns/prov#value | - By the 1950s, cervical cancer screening was being performed at hundreds of centers across the country; over the following 40 years, cervical cancer incidence and mortality decreased by 60%.2 Screening for other types of cancer was introduced soon afterward (mammography in 1963, colonoscopy in 1969)???and the use of screening increased greatly.
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