
Keywords: AHR، پاسخگویی هوایی; ACOS; Elderly asthma; Emphysema; HRCT; PhenotypeACOS, asthma-COPD overlap syndrome; AHR, Airway hyperresponsiveness; COPD, chronic obstructive pulmonary disease; DLCO, diffusion capacity of the lung for carbon monoxide; FeNO, fraction of exhaled nitric ox