1. Department of Paediatric Pneumology and Immunology; Charité Medical University; Berlin Germany
2. Upper Airways Research Laboratory; Ghent University; Ghent Belgium
3. Institute of Epidemiology; Helmholtz Zentrum Munich; German Research Centre for Environmental Health GmbH; Neuherberg Germany
4. IQVIA Commercial GmbH & Co. oHG; Frankfurt am Main Germany
5. Division of Allergology, Pulmonology and Cystic Fibrosis; Department of Paediatrics; Goethe University Hospital; Frankfurt Germany