1. Department of Pediatric Pneumology, Allergy and Neonatology; Hannover Medical School; Hannover Germany
2. Department of Pediatric Pneumology and Allergy; University Children's Hospital Regensburg (KUNO); Regensburg Germany
3. Institute of Clinical Molecular Biology; Christian-Albrechts-University Kiel; Kiel Germany
4. University Children's Hospital; Technical University Dresden; Dresden Germany
5. Children's Department; Research Institute for the Prevention of Allergic Diseases; Marien-Hospital; Wesel Germany
6. Department of Experimental Pneumology; Ruhr-University; Bochum Germany
7. University Children's Hospital; Albert Ludwigs University; Freiburg Germany
8. Kinder-und Jugendarztpraxis Laub; Rosenheim Germany
9. University Children's Hospital; University of Cologne; Cologne Germany
10. Children's Department; University Teaching Hospital; Landeskrankenhaus Feldkirch; Feldkirch Austria
11. University Children's Hospital Vienna; Vienna Austria
12. Institute of Epidemiology and Medical Biometry; Ulm University; Ulm Germany
13. Research Unit of Molecular Epidemiology; Helmholtz Zentrum Munich; Neuherberg Germany
14. Hannover Unified Biobank; Hannover Medical School; Hannover Germany
15. Division of Cell Biology; Department of Pediatrics; National Jewish Health; Denver CO USA
16. Institute of Laboratory Medicine; Philipps-Universität Marburg; Marburg Germany
17. German Lung Research Center (DZL)