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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.