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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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Excessive alcohol use costs the country approximately $235 billion every year.
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The FDA recognizes 118 routes of administration.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.