1 Maxillofacial Surgery Unit, Department of Neurosciences, Reproductive and Odontostomatological Sciences, University Federico II, Via Pansini 5, 80100 Naples, Italy.
2 Maxillofacial Surgery Unit, University Hospital of Sassari, Viale San Pietro 43/B, 07100 Sassari, Italy.
3 Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, 84081 Salerno, Italy.