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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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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

