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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.