1. Maxillofacial Surgery Operative Unit, Department of Mental Health and Sense Organs, Santa Maria Le Scotte, University Hospital of Siena, 53100 Siena, Italy
2. Maxillofacial Surgery Operative Unit, Department of Medicine, Surgery and Pharmacy, University of Sassari, 07100 Sassari, Italy
3. Biomedical Science Department, PhD School of Biomedical Science, University of Sassari, 07100 Sassari, Italy
4. Maxillofacial Surgery Unit, University Hospital “Policlinico San Marco” of Catania, 95124 Catania, Italy
5. Maxillofacial Surgery Operative Unit, University Hospital of Naples “Federico II”, 80131 Naples, Italy