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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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There are 60,000 miles of blood vessels in every adult human.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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.