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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Illicit drug use costs the United States approximately $181 billion every year.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.