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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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The horizontal fraction bar was introduced by the Arabs.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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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.