1. Faculty of Medicine and Surgery, University of Enna Kore, 94100 Enna, Italy
2. Department of Medical and Surgical Sciences and Advanced Technologies “GF Ingrassia” ENT Section, University of Catania, 95123 Catania, Italy
3. Head-Neck and Oral Surgery Unit, Department of Head-Neck Surgery, Otolaryngology, Morgagni Pierantoni Hospital, 47121 Forlì, Italy
4. Department of Anesthesiology and Intensive Care, AOU “Policlinico—San Marco”, 95123 Catania, Italy