1. Department of Periodontology Università Vita‐Salute San Raffaele Milano Italy
2. Private Practice Cesena Italy
3. Research Unit in Periodontology and Periodontal Medicine Department of Department of Experimental and Clinical Medicine University of Florence Florence Italy
4. Private Practice Modena Italy
5. Private Practice Tricesimo (Udine) Italy
6. Private Practice Bari Italy
7. Private Practice Roma Italy
8. Private practice Verona 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 Verona and Rome Italy
13. Private practice Bologna Italy
14. Department of General Surgery and Surgical‐Medical Specialities School of Dentistry University of Catania Italy
15. Private practice Viterbo Italy