1. Department of Biomedical, Dental and Morphological and Functional Images, University of Messina, Messina, Italy
2. Department of Surgical, Medical, Molecular and Critical Area Pathology, University of Pisa, Pisa, Italy
3. Associate Professor of Periodontology, Department of Biomedical, Dental and Morphological and Functional Images, University of Messina, Messina, Italy
4. Assistant Professor, Department of Medicine and Surgery, University of Insubria, Varese, Italy