xxvi c’est Grandir and Belleherbe Association. The ILD cohort was developed in collaboration with the Rare Cohort Disease (RaDiCo)-ILD project (ANR- 10-COHO-0003), the FP7-305653-child-EU project and the COST Action European network for translational research in children’s and adult interstitial lung disease (COST-ILD) project (CA16125). Louise J. Fleming is an Asthma UK Senior Clinical Fellow and reports a grant from Asthma UK (AUK-SCF-2017-399). She reports grants and speaker fees from Boehringer Ingelheim, speaker fees and fees for expert consultation from AstraZeneca and Novartis, fees for expert consultation from GSK, Sanofi and Respiri, and speaker fees from Teva, all paid direct to her institution and outside of the submitted work. Jonathan Grigg reports honoraria for advisory boards and talks from GSK, Vifor Pharmaceuticals, Novartis and AstraZeneca, outside the submitted work. Susanne Halken reports personal fees and non-financial support from ALK- Abelló, as a member of a steering committee for the Grasax Asthma Prevention (GAP) study, published 2017. Graham L. Hall reports grants and personal fees from USA CF Foundation, grants from the Australian National Health and Medical Research Council, and non-financial support from Vertex and ndd, outside the submitted work. Helge Hebestreit reports grants from a Vertex Innovation Award and Mukoviszidose eV, to support the ACTIVATE-CF Trial, outside the submitted work. Maxim Itkin reports a grant and speaking fees from the Guerbet Group, related to the submitted work. Hettie M. Janssens reports participating in a study supported by an unrestricted research grant from Vectura, receiving travel expenses and speakers fees from Vertex, as well as receiving the Vertex Innovation Award for investigator- initiated research, outside the submitted work. Pierre-Henri Jarreau reports personal fees from Abbvie France as a member of the neonatology board, related to the submitted work as well as personal fees and non-financial support from Chiesi France (course for Chiesi staff, participation in an observational study, invitations for congresses), outside the submitted work. Jon Konradsen reports grants from Stockholm County Council, related to the submitted work he has also provided material to perform IgE analysis for Thermo Fisher Scientific, and has received lecture fees from Meda AB and Novartis, outside the submitted work. Václav Koucký reports a grant from the Ministry of Health, Czech Republic (conceptual development of research organisation, University Hospital Motol, Prague, Czech Republic grant number 00064203), related to the submitted work.