1. Department of Otorhinolaryngology; Medical University of Vienna; Vienna Austria
2. Clinical Institute for Laboratory Medicine; Medical University of Vienna; Vienna Austria
3. Division of Immunopathology; Department of Pathophysiology and Allergy Research; Center for Pathophysiology, Infectiology and Immunology; Medical University of Vienna; Vienna Austria
4. Division of Hematology and Hemostaseology; Department of Internal Medicine I; Medical University of Vienna; Vienna Austria
5. Center for Medical Statistics, Informatics, and Intelligent Systems; Section for Medical Statistics; Medical University of Vienna; Vienna Austria
6. Vienna Challenge Chamber; Vienna Austria
7. Upper Airway Research Laboratory (URL); Ghent University Hospital; Ghent Belgium