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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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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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