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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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There are approximately 3 million unintended pregnancies in the United States each year.