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Illicit drug use costs the United States approximately $181 billion every year.
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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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The average adult has about 21 square feet of skin.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.