1. Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, 95124 Catania, Italy
2. Department of Life, Health & Environmental Sciences, Postgraduate School of Orthodontics, University of L’Aquila, 67100 L’Aquila, Italy
3. Department of General Surgery and Medical Surgery Specialties, Section of Maxillofacial Surgery, University of Catania, 95100 Catania, Italy