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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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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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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.