1. ETEP (Etiology and Therapy of Periodontal and Peri‐implant Diseases) Research Group University Complutense of Madrid Madrid Spain
2. Periodontal Research Group, Institute of Clinical Sciences, College of Medical & Dental Sciences The University of Birmingham Birmingham UK
3. Birmingham Community Healthcare NHS Foundation Trust Birmingham UK
4. Division of Periodontics, Section of Oral, Diagnostic and Rehabilitation Sciences, College of Dental Medicine Columbia University New York New York USA
5. Department of Periodontology, Operative and Preventive Dentistry University Hospital Bonn Bonn Germany
6. Department of Periodontology, School of Dental Medicine University of Bern Bern Switzerland
7. Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy University of Gothenburg Göteborg Sweden
8. Shanghai PerioImplant Innovation Center, Department of Oral and Maxillo‐facial Implantology, Shanghai Key Laboratory of Stomatology, National Clinical Research Centre for Oral Diseases, Shanghai Ninth People Hospital Shanghai Jiao Tong University School of Medicine Shanghai China