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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Cyanide works by making the human body unable to use oxygen.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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There are approximately 3 million unintended pregnancies in the United States each year.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.