1. Department of Civil, Environmental, Aerospace, Materials Engineering, Universita’ di Palermo, Palermo, Italy
2. Institute of Anatomy, Paracelsus Medical University, Nuremberg, Germany
3. Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Erlangen, Germany
4. Department of Otorhinolaryngology, Head and Neck Surgery, Charité-Universitätsmedizin Berlin, Berlin, Germany