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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Medication errors are more common among seriously ill patients than with those with minor conditions.