1. Department of Otorhinolaryngology-Head and Neck Surgery; Philipps University Marburg; Marburg Germany
2. Smell and Taste Clinic, Department of Otorhinolaryngology; Dresden Technical University; Dresden Germany
3. Center of Orthopedics and Traumatology; Philipps University Marburg; Marburg Germany
4. Department of Otorhinolaryngology-Head and Neck Surgery; Medical University Vienna; Vienna Austria
5. Department of Phoniatrics and Pediatric Audiology; Philipps University Marburg; Marburg Germany
6. Department of Otorhinolaryngology-Head and Neck Surgery; Chemnitz Hospital GmbH; Chemnitz Germany