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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.