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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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The horizontal fraction bar was introduced by the Arabs.
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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
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The human body produces and destroys 15 million blood cells every second.
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Illicit drug use costs the United States approximately $181 billion every year.