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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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Vaccines prevent between 2.5 and 4 million deaths every year.