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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 ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.