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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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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.