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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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People about to have surgery must tell their health care providers about all supplements they take.
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The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.