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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.