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The horizontal fraction bar was introduced by the Arabs.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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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.