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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Your heart beats over 36 million times a year.
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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.
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The familiar sounds of your heart are made by the heart's valves as they open and close.