"a history of respiratory symptoms such as wheeze, shortness of breath, chest tightness and cough that vary over time and in intensity, AND"
"prevalence in the UK: 16% 1"
"epidemiology"
"presentation"
"pathologythree major features"
"investigation"
"treatment"
"prognosis"
Expected headings
"This is a basic article for medical students and other non-radiologists"
"Plain radiograph"
"CT"
"This is a summary article; read more in our article on asthma."
"suspected pneumomediastinum, pneumothorax or surgical emphysema"