1. Department of Oto-Rhino-Laryngology, Head and Neck Surgery; Ulm University Medical Center; Ulm Germany
2. Department of Otorhinolaryngology, Head and Neck Surgery; Technical University of Munich; Germany
3. Department of Dermatology and Allergy, Allergie-Centrum-Charité; Charité - Universitätsmedizin; Berlin Germany
4. Department of Otorhinolaryngology; Head and Neck Surgery, University hospital; Essen Germany
5. Health care at Home Deutschland GmbH; Weinheim Germany
6. Department of Dermatology; Medical University of Graz; Graz Austria
7. Departments of Dermatology, Venereology, Allergology, and Immunology; Dessau Medical Center; Dessau Weinheim Germany