1. Section of Periodontology; Department of Surgery and Translational Medicine; University of Florence; Florence Italy
2. Private Practice; Florence Italy
3. School of Dentistry; University of Manchester; Manchester UK
4. Department of Statistics, Informatics and Applications “G. Parenti”; University of Florence; Florence Italy
5. Biostatistics Unit; ISPO Cancer Prevention and Research Institute; Florence Italy
6. Department of Surgical, Medical, Molecular and Critical Area Pathology; University of Pisa; Pisa Italy
7. Section of Oral Surgery; Department of Surgery and Translational Medicine; University of Florence; Florence Italy
8. Section of Endodontics; Department of Surgery and Translational Medicine; University of Florence; Florence Italy
9. European Research Group on Periodontology (ERGOPERIO); Berne Switzerland