1. Department of Oral and Maxillofacial Diseases University of Helsinki and Helsinki University Hospital Helsinki Finland
2. Department of Pathology, Haartman Institute and HUSLab University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Unit of Periodontics, Oral Health Sciences Centre, Post Graduate Institute of Medical Education & Research (PGIMER) Chandigarh India
4. Department of Periodontics and Community Dental Sciences King Khalid University Abha Saudi Arabia
5. Institute for Molecular Diagnostics IMOD Solingen Germany
6. Department for Operative Dentistry, Endodontics, and Pediatric Dentistry Philipps University Marburg and University Hospital Giessen and Marburg Marburg Germany
7. Division of Periodontology, Department of Dental Medicine Karolinska Institutet Huddinge Sweden