1. Periodontal Research Group; Institute of Clinical Sciences; College of Medical & Dental Sciences; University of Birmingham; UK
2. University of Texas Health Science Center at San Antonio; USA
3. The Forsyth Institute; Cambridge MA USA
4. School of Dentistry; University of Adelaide; Australia
5. Department of Periodontology and Synoptic Dentistry; Charité - Universitätsmedizin Berlin; Germany
6. Department of Periodontology, Center for Oral Medicine; Johann Wolfgang Goethe-University Frankfurt; Germany
7. Department of Periodontology; University of Alabama at Birmingham; USA
8. Department of Oral Biology; SUNY at Buffalo; NY USA
9. Faculty of Dentistry; University of Toronto; Canada
10. Department of Periodontology; Faculty of Dental Medicine; Hebrew University-Hadassah Medical Center; Jerusalem Israel
11. Periodontal Department; Tufts University School of Dental Medicine; Boston MA USA
12. Periodontology; Section 1; Faculty of Health and Medical Sciences; University of Copenhagen; Denmark
13. Department of Periodontology; University of Iowa College of Dentistry; Iowa City IA USA
14. Orofacial Sciences; University of California San Francisco; USA
15. Department of Periodontology; University of Bern; Switzerland
16. Department of Periodontology; University of Giessen; Germany
17. Department of Periodontology; Graduate School of Dentistry, Osaka University; Japan
18. Department of Periodontics; Texas A&M College of Dentistry; Dallas TX USA
19. Division of Periodontology; Department of Stomatology; Dental School; University of São Paulo; Brazil
20. Division of Periodontology; College of Dentistry; Ohio State University; Columbus OH USA
21. Department of Oral Health Sciences; Periodontology; KU Leuven & Dentistry; University Hospitals Leuven; Belgium
22. Research Center for the Study of Periodontal and Peri-Implant Diseases; University of Ferrara; Italy
23. Department of Periodontology, Endodontology & Cariology; University Centre for Dental Medicine; University of Basel School of Dentistry; Switzerland
24. Department of Prosthodontics; School of Dentistry, Medical University Graz; Austria
25. Orofacial Sciences; School of Dentistry; University of California San Francisco; USA
26. Division of Periodontology; Niigata University Graduate School of Medical and Dental Sciences; Japan