1 Faculty of Medicine and Surgery, University of Enna Kore, 94100, Enna, Italy.
2 Head & Neck Study Group, Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 13005, Marseille, France.
3 Department of Otolaryngology, Head & Neck Surgery, Aix-Marseille University, AP-HM, La Conception Hospital, 147, Boulevard Baille, 13005, Marseille, France.
4 Department of Otorhinolaryngology, Head and Neck Surgery, Donostia University Hospital, San Sebastian, Spain.
5 Department of Human Anatomy and Experimental Oncology, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMons), Mons, Belgium.
6 Faculty of Medicine and Surgery, University of Enna Kore, 94100, Enna, Italy. salvatore.lavalle@unikore.it.