1. Private Practice Torino Italy
2. Division of Maxillo‐Facial Surgery University of Torino Torino Italy
3. Department of Periodontics and Oral Medicine University of Michigan Ann Arbor Michigan USA
4. Department of Periodontology, School of Dental Medicine University of Bern Bern Switzerland
5. Department of Oral and Maxillo‐Facial Surgery Copenhagen University Hospital (Rigshospitalet) Copenhagen Denmark
6. Department of Restorative, Pediatric and Preventive Dentistry, School of Dental Medicine University of Bern Bern Switzerland
7. Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine University of Pisa Pisa Italy
8. Sub‐Unit of Periodontology, Halitosis and Periodontal Medicine University Hospital of Pisa Pisa Italy
9. Unit of Periodontology, Endodontology and Restorative Dentistry, Department of Medical Biotechnologies University of Siena Siena Italy
10. Private Practice Fürth Germany
11. Department of Periodontology Julius‐Maximilians‐University Würzburg Würzburg Germany