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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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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.