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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

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The horizontal fraction bar was introduced by the Arabs.

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