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The horizontal fraction bar was introduced by the Arabs.
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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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In 1864, the first barbiturate (barbituric acid) was synthesized.
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When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.