1. University Children’s Hospital, Zurich, Switzerland2Christine Kühne Center for Allergy Research and Education, Davos, Switzerland
2. Christine Kühne Center for Allergy Research and Education, Davos, Switzerland3Swiss Institute of Allergy and Asthma Research, University of Zurich, Zurich, Switzerland
3. Dr von Hauner Children’s Hospital, Ludwig Maximilian University, Munich, Germany
4. Department of Health Security, National Institute for Health and Welfare, Kuopio, Finland
5. Institute for Laboratory Medicine, Pathobiochemistry and Molecular Diagnostics, Philipps University of Marburg, Marburg, Germany
6. Swiss Tropical and Public Health Institute, Basel, Switzerland8University of Basel, Basel, Switzerland
7. Department of Health Security, National Institute for Health and Welfare, Kuopio, Finland9Department of Public Health, University of Helsinki, Helsinki, Finland
8. Children’s Hospital Schwarzach, Teaching Hospital Paracelsus Private Medical University Salzburg, Salzburg, Austria
9. University of Besançon, Department of Respiratory Disease, Unités Mixtes de Recherche/Le Centre National de la Recherche Scientifique 6249 Chrono-environment, University Hospital, Besançon, France
10. Dr von Hauner Children’s Hospital, Ludwig Maximilian University, Munich, Germany12Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany
11. Christine Kühne Center for Allergy Research and Education, Davos, Switzerland13Children’s Hospital of Eastern Switzerland, St Gallen, Switzerland
12. Department of Public Health, University of Helsinki, Helsinki, Finland
13. University of Kuopio, Kuopio, Finland
14. University of Eastern Finland, Joensuu, Finland
15. University of Besançon, Department of Pediatrics, Besançon, France
16. Comprehensive Pneumology Center Munich, Member of the German Center for Lung Research, Munich, Germany
17. Ulm University, Ulm, Germany
18. Asthma and Allergy Research Group, University of Munich, Munich, Germany
19. Department of Pediatric Pneumology and Allergy, University Children's Hospital Regensburg, Regensburg, Germany
20. Comprehensive Biomaterial Bank Marburg, Marburg, Germany
21. Utrecht University, Institue for Risk Assessment Sciences (IRAS), Division of Environmental Epidemiology, Utrecht, Germany