1. Institute for Health Resort Medicine and Health Promotion State Institute of Health, Bavarian Health and Food Safety Authority Bad Kissingen Germany
2. Institute of Social Medicine and Health Systems Research (ISMHSR), Medical faculty Otto‐von‐Guericke University Magdeburg Magdeburg Germany
3. Department of Health Security Finnish Institute for Health and Welfare Kuopio Finland
4. Institute of Public Health and Clinical Nutrition University of Eastern Finland Kuopio Finland
5. Institute of Epidemiology Helmholtz Zentrum MünchenGerman Research Center for Environmental Health Neuherberg Germany
6. Department of Environmental and Biological Sciences University of Eastern Finland Kuopio Finland
7. Institute of Laboratory Medicine Philipps University of Marburg Marburg Germany
8. German Center for Lung Research (DZL) Marburg Germany
9. Department of Pediatrics Division of Pediatric Pulmonology and Allergology University Children’s HospitalUniversity of Bern Bern Switzerland
10. University Children’s Hospital (UKBB)University of Basel Basel Switzerland
11. Department for Biomedical Research University of Bern Bern Switzerland
12. Department of Pediatric Pulmonology & Allergology University Childrens’s Hospital Schleswig‐Holstein Campus Lübeck, Airway Research Center North (ARCN)Member of the German Center for Lung Research (DZL) Lübeck Germany
13. Department of Public Health University of Helsinki Helsinki Finland