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Tracheitis (chronic bronchitis) is an inflammatory change of tracheal and bronchial mucosa caused by infectious or non-infectious factors, with increased mucus secretion. It is mainly characterized by long-term cough, expectoration or wheezing in clinic. The early symptoms of this disease are mild, mostly in winter, relieved after warm spring, and the course of disease is slow, so it is not noticed by people. Late...

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