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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.