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 Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
