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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
The average adult has about 21 square feet of skin.
Vaccines prevent between 2.5 and 4 million deaths every year.
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