1. Department of Otorhinolaryngology, Head and Neck Surgery, Klinikum Stuttgart, Stuttgart, Germany.
2. Institute of Diagnostic and Interventional Radiology, University Hospital Cologne, Cologne, Germany.
3. Department of Tissue Engineering and Regenerative Medicine (TERM), University Hospital Würzburg, Würzburg, Germany.
4. University Department of Otorhinolaryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, Universitiy Hospital Würzburg, Würzburg, Germany.
5. Department of Otorhinolaryngology, Head and Neck Surgery “Otto-Körner”, University Hospital Rostock, Rostock, Germany.