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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.