1. Department of Maxillofacial Surgery, Spirito Santo Hospital, 65124 Pescara, Italy
2. Department of Surgical, Oncological and Oral Sciences, University of Palermo, 90128 Palermo, Italy
3. Department of Oral and Maxillofacial Surgery, Central University Hospital of Asturias, University of Oviedo, 33006 Oviedo, Spain