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The familiar sounds of your heart are made by the heart's valves as they open and close.
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Illicit drug use costs the United States approximately $181 billion every year.
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