1. Pediatrics Department; University Hospital of Besançon; Besançon France
2. Pediatric Allergy Department; University Hospital of Nancy; Nancy France
3. UMR 6249 Chrono-Environment; CNRS and University of Franche-Comté; Besançon France
4. Clinical Methodology Center; University Hospital of Besançon; Besançon France
5. Respiratory Diseases Department; University Hospital of Besançon; Besançon France
6. Dr. von Hauner Children's Hospital; Ludwig Maximilians University Munich; Munich Germany
7. Institute for Laboratory Medicine, Pathobiochemistry and Molecular Diagnostics; Philipps University of Marburg; Marburg Germany
8. Children's Hospital Schwarzach; Salzburg Austria
9. Department of Health Protection; National Institute for Health and Welfare; Kuopio Finland
10. Department of Public Health; University of Helsinki; Helsinki Finland
11. Christine Kühne Center for Allergy Research and Education (CK-CARE); Davos Switzerland
12. Children's Hospital of Eastern Switzerland; St. Gallen Switzerland
13. University Children's Hospital Zurich; Zurich Switzerland
14. EA 3181; University of Franche-Comté; Besançon France
15. CPC-M; Member of the German Center for Lung Research; Giessen Germany