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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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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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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.