1. Unit of Otorhinolaryngology, Department of Surgery, Azienda Ospedaliero-Universitaria di Cagliari, University of Cagliari, 09100 Cagliari, Italy
2. Unit of Pathology, Department of Medical Sciences and Public Health, Azienda Ospedaliero-Universitaria di Cagliari, University of Cagliari, 09100 Cagliari, Italy
3. Unit of Dermatology, Department of Medical Sciences, Azienda Ospedaliero-Universitaria di Cagliari, University of Cagliari, 09100 Cagliari, Italy
4. Unit of Plastic Surgery, Department of Surgery, Azienda Ospedaliero-Universitaria di Cagliari, University of Cagliari, 09100 Cagliari, Italy
5. Unit of Otorhinolaryngology, Department of Surgery, King’s College Hospital London-Dubai, Dubai P.O. Box 340901, United Arab Emirates