1. Maxillofacial Surgery Operative UnitUniversity Hospital of Sassari Sassari Italy
2. Maxillofacial Surgery Operative UnitUniversity Hospital of Naples “Federico II” Naples Italy
3. Maxillofacial Surgery Operative Unit; Bellaria and Maggiore HospitalAUSL Bologna Italy
4. Department of Medical, Surgical and Experimental SciencesUniversity of Sassari Sassari Italy
5. Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”University of Salerno Baronissi Italy