1. Department of Periodontology Operative& Preventive Dentistry, University of Bonn Germany
2. Department of Oral Surgery and Implantology, Carolinum Johann Wolfgang Goethe‐University Frankfurt Germany
3. Department of Periodontics and Prosthodontics Policlinico Umberto I Eastman Dental Hospital RomeItaly
4. Department of Periodontology Institute of Odontology The Sahlgrenska Academy at University of Gothenburg GothenburgSweden
5. Clinic of Fixed and Removable Prosthodontics and Dental Material Science University of Zürich Switzerland
6. International Research Collaborative ‐ Oral Health and Equity School of Anatomy, Physiology and Human Biology University of Western Australia Australia
7. Department of Oral and Maxillofacial Surgery International University of Catalonia BarcelonaSpain
8. Department of Oral and Maxillofacial Surgery and Department of Implant Dentistry University Medical Center Groningen GroningenThe Netherlands
9. ETEP (Etiology and Therapy of Periodontal Diseases) Research Group University Complutense MadridSpain
10. Department of Reconstructive Dentistry University of Iceland ReykjavikIceland
11. Department of Oral and Maxillofacial Surgery University of Groningen University Medical Center Groningen Groningen the Netherlands
12. Oral Health Sciences Kristianstad University KristianstadSweden
13. Department of Periodontology Eastman Dental Institute UCL LondonUK
14. Division of Maxillofacial Surgery University of Torino Italy
15. Dept. of Periodontology University of Milan MilanItaly
16. Research Centre for the Study of Periodontal and Peri‐implant Diseases University of Ferrara FerraraItaly
17. Graduate Implant Dentistry Loma Linda University Loma Linda California USA