"Asthma is a chronic lung disease characterized by recurrent and intermittent episodes or attacks in which the linings of the airways swell, mucus blo...
National Center for Environmental Health (U.S.). Division of Environmental Science and Practice.
January 18, 2017
Description:
Asthma is a common, chronic disorder of the airways characterized by wheezing, breathlessness, chest tightness, and coughing at night or early in the ...
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