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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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