1. Section of Cranio-Maxillo-Facial Surgery, Department of Head & Neck Surgery, University Hospital of Modena, Modena, Italy
2. Unit of Oral and Maxillofacial Surgery, Department of Surgery, Azienda Ospedaliera Universitaria Integrata Verona, Verona, Italy
3. Unit of Maxillofacial Surgery, Department of Neurosciences, University of Padova, Padua, Italy