Fig. 1From: Identification and treatment of persistent small airway dysfunction in paediatric patients with asthma: a retrospective cohort studyPatient screen and follow-up. FeNO, fractional concentration of exhaled nitric oxide; ICS, inhaled corticosteroids; ICS/LABA, combined ICS with a long-acting beta-agonist; p-SAD, persistent small airway dysfunctionBack to article page