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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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Medication errors are more common among seriously ill patients than with those with minor conditions.