1. Department of Oral and Maxillofacial Surgery, Catholic University of the Sacred Heart Medical School, Rome, Italy
2. Department of Oral and Maxillofacial Surgery, Foligno Hospital, Foligno, Italy
3. Department of Oral and Maxillofacial Surgery, Nuovo Ospedale San Giovanni Battista, Foligno, Italy
4. Department of Neurosurgery, Queen Elizabeth Hospital, Birmingham, UK
5. Department of Orthodontics, University of Milan, Milan, Italy