1. School of Dentistry; University of Padova; Padova Italy
2. Institute of Clinical Physiology; National Research Council; Pisa Italy
3. Department of Management and Engineering; University of Padova; Padova Italy
4. Department of Dentistry and Maxillofacial Surgery; Hospital of Treviso; Treviso Italy
5. School of Dentistry; University of Siena; Siena Italy