1. Maxillofacial Surgery Unit, Department of Neurosciences, Reproductive and Odontostomatological Sciences University of Naples Federico II Naples Italy
2. Department of Public Health University of Naples Federico II Naples Italy
3. Maxillofacial Surgery Unit, Department of Medical, Surgical and Experimental Sciences University of Sassari Sassari Italy
4. ENT Unit, Department of Biotechnology and Life Sciences University of Insubria, Ospedale di Circolo Via Guicciardini Varese Italy
5. Division of Oral and Maxillofacial Surgery, Hospital General Universitario Gregorio Marañón Universidad Complutense de Madrid Madrid Spain