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There are more bacteria in your mouth than there are people in the world.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Women are 50% to 75% more likely than men to experience an adverse drug reaction.

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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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Illicit drug use costs the United States approximately $181 billion every year.

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