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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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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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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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Medication errors are more common among seriously ill patients than with those with minor conditions.

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