1. Department of Otorhinolaryngology, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
2. Facial-Nerve-Center Jena, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
3. Center of Rare Diseases Jena, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany
4. Department of Plastic and Hand Surgery, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
5. University of Texas Southwestern Medical Center, Dallas, TX 75390, USA