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Approximately 500,000 babies are born each year in the United States to teenage mothers.
The longest a person has survived after a heart transplant is 24 years.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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