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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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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.