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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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The average office desk has 400 times more bacteria on it than a toilet.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.