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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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People about to have surgery must tell their health care providers about all supplements they take.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.