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Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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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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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.