1 Department of Immunology-Allergology-Rheumatology and the Infla-med Centre of Excellence, University of Antwerp-University Hospital of Antwerp, Antwerp University, Antwerp, Belgium.
2 Department of Immunology-Allergology, AZ Jan Palfijn Ghent, Ghent, Belgium.
3 Ruhr-University Bochum, IPA-Institute for Prevention and Occupational Medicine, German Social Accident Insurance, Bochum, Germany.
4 Pediatrics, University of Antwerp-University Hospital of Antwerp, Antwerp, Belgium.