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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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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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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.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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