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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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The longest a person has survived after a heart transplant is 24 years.
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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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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.