1. Division of Regenerative Dentistry and Periodontology University Clinics of Dental Medicine (CUMD) University of Geneva Geneva Switzerland
2. Department of Periodontology Faculty of Odontology University of Malmö Sweden
3. Division of Conservative Dentistry and Periodontology University Clinic of Dentistry Medical University of Vienna Vienna Austria
4. Division of Oral Surgery University Clinic of Dentistry Medical University of Vienna Austria
5. Midwifery Research and Education Unit Hannover Medical School Hannover Germany
6. Department of Periodontology School of Dental Medicine University of Bern Switzerland
7. Accademia Toscana di Ricerca Odontostomatologia (ATRO) Florence Italy
8. European Research Group on Periodontology (ERGOPERIO) Genova Italy
9. Department of Oral and Maxillofacial Implantology, Shanghai Key Laboratory of Stomatology, National Clinical Research Centre of Stomatology, Shanghai 9th People Hospital, School of Medicine Shanghai Jiao Tong University Shanghai China