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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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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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People about to have surgery must tell their health care providers about all supplements they take.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.