1. Clinic of Conservative and Preventive Dentistry, Division of Periodontology and Peri‐implant Diseases, Center of Dental Medicine University of Zurich Zurich Switzerland
2. Department of Clinical Affairs and Medical Education Electro Medical Systems SA Nyon Switzerland
3. Dr. Strafela‐Bastendorf Dental Practice Eislingen Germany
4. Department of Dental Medicine, Division of Oral Diseases Karolinska Institutet Stockholm Sweden
5. Department of Periodontology, Cariology and Preventive Dentistry University of Bonn Bonn Germany
6. Department of Periodontology, Faculty of Dentistry National and Kapodistrian University of Athens Athens Greece
7. Section of Periodontics, Department of Surgical Specialities, Radiological Science and Public Health, School of Dentistry University of Brescia Brescia Italy
8. Discipline of Periodontics, School of Dentistry, Faculty of Medicine and Health The University of Sydney Sydney New South Wales Australia
9. Department of Periodontology, Faculty of Odontology University of Malmö Malmö Sweden
10. Division of Conservative Dentistry and Periodontology University Clinic of Dentistry, Medical University of Vienna Vienna Austria