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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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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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There are 60,000 miles of blood vessels in every adult human.
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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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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

