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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.