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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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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.