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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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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.