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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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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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Vaccines prevent between 2.5 and 4 million deaths every year.