1. Department of Otorhinolaryngology, Head and Neck Surgery; Universitätsmedizin Mannheim; Medical Faculty Mannheim; Heidelberg University; Mannheim Germany
2. Center for Rhinology and Allergology Wiesbaden; Wiesbaden Germany
3. Fraunhofer Institute for Toxicology and Experimental Medicine ITEM; Member of the German Center for Lung Research; Hannover Germany
4. Hannover Medical School; Hannover Germany
5. Department of Otorhinolaryngology; Saarland University Medical Center; Homburg/Saar Germany
6. Department of Otorhinolaryngology; Head and Neck Surgery; University Hospital Carl Gustav Carus at the Technische Universität Dresden; Dresden Germany
7. Department of Dermatology; University Hospital Düsseldorf; Düsseldorf Germany
8. Department of Dermatology; University Hospital of Cologne; Cologne Germany
9. Department of Dermatology; Jena University Hospital; Jena Germany
10. Medical Care Centre of Evangelical Chest Clinic Berlin; Berlin Germany
11. Division of Allergy and Immunology; Department of Dermatology and Allergy; Charité Campus Mitte; Universitätsmedizin Berlin; Berlin Germany