1. Department of Surgical and Morphological Science, Dental School, University of Insubria, 21100 Varese, Italy
2. ITEB Research Centre, University of Insubria, 21100 Varese, Italy
3. Private Practice, 00193 Rome, Italy
4. Department of Medical, Oral and Biotechnological Sciences, Dental School, University G. d’Annunzio, 66100 Chieti, Italy