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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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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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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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