1. Maxillofacial Surgery Department, Hospital General Universitario Gregorio Marañón, C/Doctor Esquerdo 46, 28007 Madrid, Spain
2. Maxillofacial Surgery Department, Hospital Universitario La Paz Madrid, P.º de la Castellana, 261, 28046 Madrid, Spain
3. Pathological Anatomy Department, Hospital General Universitario Gregorio Marañón, C/Doctor Esquerdo 46, 28007 Madrid, Spain
4. Maxillofacial Surgery Department, Università “Federico II”, 80131 Naples, Italy
5. Public Health and Maternal & Child Health Department, School of Medicine, Universidad Complutense, 28040 Madrid, Spain