1. Department of Otorhinolaryngology Head and Neck Surgery University of Insubria Varese Italy
2. Department of Otorhinolaryngology Head and Neck Surgery University of Genova Genova Italy
3. Endoscopic Skull Base Centre Athens Hygeia Hospital Athens Greece
4. Head and Neck Surgery and Forensic Dissection Research Center (HNS&FDRc), Department of Biotechnology and Life Sciences University of Insubria Varese Italy
5. Department of Otolaryngology Head and Neck Surgery University of Nicosia Nicosia Cyprus
6. Department of Otolaryngology Head and Neck Surgery University of Insubria Como Italy