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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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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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The horizontal fraction bar was introduced by the Arabs.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.