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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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