1. Maxillofacial Surgery Operative Unit, Bellaria and Maggiore Hospital, 47814 Bologna, Italy
2. Maxillofacial Surgery Operative Unit, Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University of Naples, 80131 Naples, Italy
3. Plastic Surgery Unit, Bellaria and Maggiore Hospital, 47814 Bologna, Italy
4. Department of Medical and Surgical Sciences, Division of Plastic Surgery, University of Modena and Reggio Emilia, Policlinico of Modena, Largo Pozzo 71, 41124 Modena, Italy
5. Dentistry Operative Unit, Bellaria and Maggiore Hospital, 47814 Bologna, Italy
6. Maxillofacial Surgery Operative Unit, Department of Medicine, Surgery and Pharmacy, University of Sassari, 07100 Sassari, Italy
7. Biomedical Science Department, PhD School of Biomedical Science, University of Sassari, 07100 Sassari, Italy
8. Department of Medicine and Surgery, University of Salerno, Via Salvador Allende 43, Baronissi, 84081 Salerno, Italy
9. Otolaryngology Department, University of Catania, 95124 Catania, Italy