Participants
-20
This study was conducted on a cohort of children recruited to the Respiratory Health Outcomes in Neonates study (RHiNO, EudraCT: 2015-003712-20) which has been described previouslyResponders were assessed at their home and a subset attended the hospital children’s research facility for comprehensive respiratory testing including collection of EBC (RTube®, Respiratory Research Inc. Texas, USA), conducted by a trained nurse and paediatrician between January 2017 and November 2019. Spirometry (MasterScreen Body and PFT systems, Vyaire Medical, Germany) was performed to ATS/ERS guidelinesPT