1. Center for Rhinology and Allergology, 65183 Wiesbaden, Germany
2. Department of Otorhinolaryngology, Charité – Universitätsmedizin Berlin, 10117 Berlin, Germany
3. Department of Otorhinolaryngology, Münster University Hospital, 48149 Münster, Germany; Department of Otorhinolaryngology, Head and Neck Surgery of Greifswald University Medical Center, 17475 Greifswald, Germany
4. Department of Otorhinolaryngology, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany; Center for Allergy and Environment (ZAUM), TUM School of Medicine, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
5. Department of Otorhinolaryngology, Mainz University Medical Center, 55131 Mainz, Germany
6. Department of Otorhinolaryngology, Ulm University Hospital, 89081 Ulm, Germany
7. Department of Otorhinolaryngology, Head and Neck Surgery, Ruhr University Bochum, St. Elisabeth Hospital, 44787 Bochum, Germany
8. German Society for Otorhinolaryngology, Head and Neck Surgery, 53113 Bonn, Germany
9. Clinic and Polyclinic for Otorhinolaryngology, Bonn University Hospital, 53127 Bonn, Germany
10. Ear, Nose and Throat Specialist, 32052 Herford, Germany
11. Medical Association of German Allergists, 65183 Wiesbaden, Germany
12. Clinic for Otorhinolaryngology, Hanover Hospital, 30167 Hannover, Germany
13. Department of Otorhinolaryngology, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, 81675 Munich, Germany
14. Department of Otorhinolaryngology, University Hospital Tübingen, 72016 Tübingen, Germany
15. Department of Otorhinolaryngology, Münster University Hospital, 48149 Münster, Germany
16. Clinic and Polyclinic for Otorhinolaryngology, University Hospital Carl Gustav Carus, TU Dresden, 01307 Dresden, Germany
17. Clinic and Polyclinic for Otorhinolaryngology, University Hospital Regensburg, 93053 Regensburg, Germany
18. Department of Otorhinolaryngology, Jena University Hospital, 07747 Jena, Germany
19. Frankfurt University Ear, Nose and Throat Clinic, 60596 Frankfurt am Main, Germany
20. Practice for Otorhinolaryngology, Clinic RKM 740, 40549 Düsseldorf, Germany
21. Practice for Ear, Nose and Throat Medicine and Allergology, 40476 Düsseldorf, Germany
22. Department of Otorhinolaryngology, University Hospital Giessen and Marburg GmbH, Marburg site, Philipps University Marburg, 35037 Marburg, Germany
23. Department of Otorhinolaryngology, HSK Wiesbaden, 65199 Wiesbaden, Germany
24. Clinic and Polyclinic for Otorhinolaryngology, LMU University Hospital, 80336 Munich, Germany
25. Clinic for Dermatology, Venereology and Allergology, Allergy Center South Lower Saxony, University Medical Center Göttingen, 37075 Göttingen, Germany
26. Department of Otorhinolaryngology, Kiel University Hospital, 24105 Kiel, Germany
27. Department of Otorhinolaryngology, Karlsruhe Municipal Hospital, 76133 Karlsruhe, Germany
28. Department of Otorhinolaryngology, University Medical Center Freiburg, 79106 Freiburg, Germany
29. Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
30. Department of Otorhinolaryngology, Ghent University Hospital, 9000 Ghent, Belgium