1. Department of Otorhinolaryngology, Head & Neck Surgery, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany
2. Department of Neuroscience DNS, Otolaryngology Section, University of Padova, 35122 Padova, Italy
3. Institute of Pathology, Martin Luther University Halle-Wittenberg, 06112 Halle (Saale), Germany
4. Institute of General Pathology and Pathological Anatomy, Molecular Pathology Diagnostics, University Hospital, 50937 Cologne, Germany
5. Department of Laboratory Medicine, Central Laboratory, University Hospital Halle, 06120 Halle (Saale), Germany
6. Department of Radiology, Martin Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany