1. ENT & Audiology Unit, Department of Neurosciences, University Hospital of Ferrara, 44100 Ferrara, Italy
2. DIMES Department, Bologna University, 40100 Bologna, Italy
3. Plastic Surgery, M. Bufalini Hospital, AUSL Romagna, 47521 Cesena, Italy
4. ENT Department, Morgagni Pierantoni Hospital, AUSL Romagna, 47121 Forliì, Italy
5. Head-Neck and Oral Surgery Unit, Department of Head-Neck Surgery, Otolaryngology, Santa Maria delle Croci Hospital, AUSL Romagna, 48121 Ravenna, Italy
6. Maxillo-Facial Unit, M. Bufalini Hospital, AUSL Romagna, 47521 Cesena, Italy