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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
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The horizontal fraction bar was introduced by the Arabs.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.