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Asthma cases in Americans are about 75% higher today than they were in 1980.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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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.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.