1. Private Practice; Gravedona (Como); Italy
2. Dental School; University of Varese; Varese; Italy
3. Nanoworld Institute; University of Genoa; Genoa; Italy
4. Department of Biomaterials; Dental School; University of Birmingham; Birmingham; UK
5. Department of Periodontology; Dental Research Division; Guarulhos University; Guarulhos; Sao Paulo; Brazil
6. Department of Oral Pathology and Oral Medicine; Dental School; University of Chieti-Pescara; Chieti; Italy