1. Department of Otorhinolaryngology; Jena University Hospital; Jena Germany
2. Facial Nerve Center Jena; Jena University Hospital; Jena Germany
3. Department of Otorhinolaryngology; Zentralklinikum; Suhl Germany
4. Department of Otorhinolaryngology; Südharz-Krankenhaus gGmbH; Nordhausen Germany
5. Department of Otorhinolaryngology; HELIOS-Klinikum; Erfurt Germany
6. Department of Neurology; HELIOS-Klinikum; Erfurt Germany
7. Department of Otorhinolaryngology; Sophien/Hufeland-Klinikum; Weimar Germany
8. Department of Otorhinolaryngology; Klinikum Bad Salzungen; Bad Salzungen Germany
9. Department of Otorhinolaryngology; SRH Wald-Klinikum; Gera Germany
10. Department of Otorhinolaryngology; Ilm-Kreis-Kliniken; Arnstadt Germany
11. Department of Neurology; Jena University Hospital; Jena Germany