1. Department of Immunology, Allergology, Rheumatology and the Infla-Med Centre of Excellence, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
2. Department of Immunology, Allergology, Rheumatology, Antwerp University Hospital, Antwerp, Belgium
3. Faculty of Medicine and Health Sciences, Department of Paediatrics and the Infla-Med Centre of Excellence, Antwerp, Belgium
4. Department of Paediatrics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
5. Department of Haematology, Antwerp University Hospital, Antwerp, Belgium
6. Department of Clinical Biology, Antwerp University Hospital, Antwerp, Belgium
7. Department of Allergology, University Medical Center Groningen, University of Groningen, and Groningen Research Institute for Asthma and COPD, Groningen, The Netherlands
8. Department of Immunology and Allergology, AZ Jan Palfijn Gent, Ghent, Belgium