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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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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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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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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.