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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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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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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.