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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.