1. Department of Oral and Maxillofacial Surgery, Central University Hospital of Asturias, 33011 Oviedo, Spain
2. Department of Oral and Maxillofacial Surgery, Faculty of Medicine and Health Sciences, University of Oviedo, C/. Catedrático Serrano s/n., 33006 Oviedo, Spain
3. Department of Otolaringology, 12 de Octubre University Hospital, 28041 Madrid, Spain
4. Department of Radiology, San Agustín University Hospital, 33401 Avilés, Spain