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There are more nerve cells in one human brain than there are stars in the Milky Way.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
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