Bronchial Asthma (Asthma) 支气管
I. Epidemiology  流行病学 A very common disease  哮喘为常见病   USA  5%           美国 5％   China 0.5% - 1.0%   中国0.5% - 1.0% Prevalence is increa
II. Definition 定义    Asthma is a chronic inflammatory disorder of the airways in which many cells and cellular elements play a role. The chronic inflammation causes an associated airway hyperresponsiveness that leads to recurrent episodes of wheezing, breathlessness, chest tightness, and coughing, particularly at night or in the earl ...