1. Department of Periodontology; Nova Southeastern University; Fort Lauderdale, Florida USA
2. Department of Periodontology; University of Bern; Bern Switzerland
3. Department of Periodontics; Dental School; University of Texas Health Science Center at San Antonio; San Antonio TX USA
4. Department of Periodontology and Implant Dentistry; College of Dentistry; New York University; New York NY USA
5. Department of Biomedical and Neuromotor Sciences; University of Bologna; Bologna Italy
6. Department of Periodontology and Dental Implantology; Dental School; Tel-Aviv University; Tel-Aviv Israel
7. Department of Periodontology; Queen Marry University of London; London UK
8. Department of Biomaterials; Faculty of Dentistry; University of Oslo; Oslo Norway
9. Section of Experimental Dento-Maxillo-Facial Medicine; University of Bonn; Bonn Germany
10. New York University; College of Dentistry; New York NY USA
11. Department of Periodontology; Malmö University; Malmö Sweden
12. Department of Oral Implantology; Wuhan University; Wuhan China
13. Department of Periodotology; Research Centre for the Study of Periodontal and Peri-implant Diseases; University of Ferrara; Ferrara Italy
14. Department of Operative Dentistry and Periodontology; University Medical Center; Mainz Germany
15. Department of Periodontology; Kagoshima University Graduate School of Medical and Dental Sciences; Kagoshima Japan
16. Accademia Toscana di Ricerca Odontostomatologica; Firenze Italy
17. European Research Group on Periodontology (ERGOPerio); Genova Italy
18. Department of Biomedical; Surgical and Dental Sciences; University of Milan; Milan Italy
19. Foundation IRCCS Ca’ Granda Polyclinic; Milan Italy
20. Department of Periodontology; Operative and Preventive Dentistry; University of Bonn; Bonn Germany