1. Department of Microbiology, Immunology and Transplantation Allergy and Clinical Immunology Research group KU Leuven Leuven Belgium
2. European Forum for Research and Education in Allergy and Airway Diseases (EUFOREA) Brussels Belgium
3. ALK‐Abello Hørsholm Denmark
4. Clinical Division of Otorhinolaryngology, Head and Neck Surgery University Hospitals Leuven Leuven Belgium
5. Clinical Division of Otorhinolaryngology, Head and Neck Surgery Academic Medical Center Amsterdam The Netherlands
6. Faculty of Medicine and Health Sciences University of Ghent Ghent Belgium