1. Research Unit in Periodontology and Periodontal Medicine Department of Department of Experimental and Clinical Medicine University of Florence Florence Italy
2. Private practice Modena Italy
3. Private practice Tricesimo(Udine) Italy
4. Department of Periodontology Università Vita‐Salute San Raffaele Milano Italy
5. Private practice Bari Italy
6. Private practice Roma Italy
7. Private practice Verona Italy
8. Private practice Cesena Italy
9. Department of Biomedical Surgical and Dental Sciences University of Milan Milan Italy
10. Section of Occupational Medicine Department of Public Health University of Naples Federico II Naples Italy
11. Department of Health Sciences Section of Medical Forensic Sciences University of Florence Florence Italy
12. Private Practice Rome Italy
13. SIdP Florence Italy
14. Private Practice Bologna Italy
15. Private Practice Viterbo Italy
16. Research Unit in Periodontology and Periodontal Medicine Department of Experimental and Clinical Medicine University of Florence Florence Italy