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In 1864, the first barbiturate (barbituric acid) was synthesized.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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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.