1. Department of Otorhinolaryngology; Head and Neck Surgery, Heinrich-Heine-University Duesseldorf; Duesseldorf; Germany
2. Laboratory of Molecular Neurobiology; Clinics for Psychiatry und Psychotherapy, University of Duisburg-Essen; Essen; Germany
3. Department of Otorhinolaryngology and Center of Allergy and Environment (ZAUM); Technical University Munich; Munich; Germany