1. Department of Bio-Medical Sciences; Section of Anatomy; University of Catania; Catania; Italy
2. Department of Orthodontics; University of Catania; Catania; Italy
3. Department of Surgical Sciences; Institute of Pathology and Cytopathology; University of Foggia; Foggia; Italy
4. Faculty of Dental Medicine; “Carol Davila” University of Medicine and Pharmacy; Bucharest; Romania