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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.