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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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