1. Department of Pediatrics Turku University Hospital and University of Turku Turku Finland
2. Department of Parasitology Leiden University Medical Center Leiden The Netherlands
3. COPSAC Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital University of Copenhagen Copenhagen Denmark
4. Department of Pediatric Allergy Istanbul Medeniyet University Göztepe Training and Research Hospital Istanbul Turkey
5. Astrid Lindgren Children's Hospital Karolinska University Hospital Stockholm Sweden
6. Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
7. Department of Medicine Solna Immunology and Allergy Unit Karolinska Institutet Karolinska University Hospital Stockholm Sweden
8. Allergy Department 2nd Pediatric Clinic University of Athens Athens Greece
9. Imperial College Healthcare NHS Trust London UK
10. Division of Infection Immunity & Respiratory Medicine University of Manchester Manchester UK
11. Department of Pediatrics Medical University of Warsaw Warsaw Poland
12. Department of Pediatric Pneumonology and Allergy Medical University of Warsaw Warsaw Poland
13. Pediatric Allergology Department of Pediatrics Dr. von Hauner Children′s Hospital University Hospital German Center for Lung Research (DZL) LMU Munich Munich Germany
14. Centre for Inflammation Research Queen's Medical Research Institute and Child Life and Health University of Edinburgh Edinburgh UK
15. Institute of Laboratory Medicine Philipps Universität Marburg Marburg Germany
16. Universities of Giessen and Marburg Lung Center (UGMLC) Philipps Universität, Marburg German Center for Lung Research (DZL) Marburg Germany