1. Division of Otorhinolaryngology, Department of Biotechnology and Life Sciences University of Insubria, Territorial Social Health Companies of the Seven Lakes, Circolo Hospital and Macchi Foundation Varese Italy
2. Head and Neck Surgery and Forensic Dissection Research Center, Department of Biotechnology and Life Sciences University of Insubria Varese Italy
3. Department of Otorhinolaryngology–Head and Neck Surgery Zagazig University Zagazig Egypt
4. Division of otolaryngology Head and neck surgery, European institute of oncology IRCCS Milan Italy