Strengths
It is one of the few studies that evaluated IPFT in children with airway anomalies with a reasonable number of participants. It is possibly the first study in which follow-up IPFT was done in airway anomalies patients. IPFT parameters were compared with a similar number of controls, matched with birth weight, sex and age. The IPFT was performed successfully in most children with mild sedation, spontaneous sleep or when the child is quietly watching videos on a mobile. Reporting of IPFT patterns and bronchoscopy findings was done by three persons independently.