1. Department of Respiratory Medicine, Immunology and Critical Care Medicine Charité Universitätsmedizin Berlin Berlin Germany
2. Pediatric Allergy Unit University Hospital of Geneva University of Geneva Geneva Switzerland
3. Department of Clinical Science and Education Södershjukhuset Karolinska Institutet Stockholm Sweden
4. Leibniz Lung Center Airway Research Center North (ARCN) German Center for Lung Research (DZL), Borstel Institute of Experimental Medicine Christian Alberts University Kiel Germany
5. Department for Paediatric Cardiology, Intensive Care and Neonatology University Medicine Göttingen Germany
6. Pediatric Allergology Department of Pediatrics Dr. von Hauner Children’s University Hospital LMU Munich‐Member of the German Center for Lung Research–DZL‐LMU Munich Munich Germany
7. Hans Cristian Andersen Children’s Hospital Odense University Hospital Odense Denmark
8. Department of Pediatrics School of Medicine and Public Health University of Wisconsin Madison Wisconsin USA
9. Department of Pediatrics Children’s Center Bethel University Medicine Bielefeld Germany
10. Department of Pediatrics Division of Pediatrics Pulmonology, Allergology and Endocrinology Comprehensive Center Pediatrics Medical University of Vienna Vienna Austria
11. Health Research Institute, Hospital Universitario La Fe. Valencia Spain