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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.