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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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People about to have surgery must tell their health care providers about all supplements they take.
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The horizontal fraction bar was introduced by the Arabs.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.