Fig. 2From: The value of bronchodilator response in FEV1 and FeNO for differentiating between chronic respiratory diseases: an observational studyStrongly positive BDT rates in the asthma, COPD, and ACO groups under three different standards. COPD, chronic obstructive pulmonary disease; ACO, asthma–chronic obstructive pulmonary disease overlap; BDT, bronchodilation testBack to article page