1. Department of Pediatrics Franciscus Gasthuis & Vlietland Rotterdam the Netherlands
2. Department of Neonatology Erasmus Medical CenterSophia Children's Hospital Rotterdam the Netherlands
3. Department of Pediatric Pneumonology and Allergy Medical University of Warsaw Warsaw Poland
4. Doctoral School Medical University of Warsaw Warsaw Poland
5. Immunology Unit University of Verona and General Hospital Borgo Roma Hospital Verona Italy
6. Faculty of Medicine University of BelgradeUniversity Children's Hospital Belgrade Serbia
7. Department of Cardiovascular and Thoracic Sciences Università Cattolica del Sacro CuoreFondazione Policlinico Universitario A. Gemelli – IRCCS Rome Italy
8. National Heart and Lung Institute (NHLI) Imperial College London London UK
9. Department of Ear‐Nose‐Throat surgery General Hospital of Kozani Kozani Greece
10. Department of Allergology & Clinical Immunology ‘Mother Theresa’ School of Medicine Tirana Albania
11. Departments of Medicine and Microbiology APC Microbiome IrelandNational University of Ireland Cork Ireland
12. Swiss Institute of Allergy and Asthma Research (SIAF) University of Zurich Zurich Switzerland
13. Institute of Pathophysiology and Allergy Research Center for Pathophysiology, Infectiology and Immunology Medical University of Vienna Vienna Austria