| Affiliation: | 1. Department of General Surgery and Surgical-Medical Specialties, School of Dentistry, University of Catania, Catania, Italy;2. Department of Economics, Unit of Statistical and Mathematical Sciences, University of Messina, Messina, Italy;3. Department of Biomedical and Odontostomatological Sciences and Morphological and Functional Images, University of Messina, Messina, Italy;4. Department of Restorative Dentistry, Periodontology, Endodontology and Preventive and Pediatric Dentistry, University Medicine Greifswald, Greifswald, Germany |
