1 Division of Otorhinolaryngology, "San Maurizio" Hospital, Bolzano, Italy.
2 Division of Otorhinolaryngology, Department of Biotechnology and Life Sciences, University of Insubria, ASST Sette Laghi, Ospedale di Circolo e Fondazione Macchi, Via Guicciardini 9, 21100 Varèse, Italy.
3 3Department of Surgical Oncology, Oncology Center, Mansoura University, Mansoura, Egypt.