1. Department of Preventive Dentistry, Faculty of Dental Sciences College of Medicine, University of Lagos & Lagos University Teaching Hospital Lagos Nigeria
2. Department of Oral and Maxillofacial Diseases Head and Neck Center, University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Oral Health Sciences Centre Post Graduate Institute of Medical Education & Research Chandigarh India
4. Department of Preventive and Community Dentistry, Faculty of Dentistry College of Health Sciences, Obafemi Awolowo University Ile‐Ife Nigeria
5. Department of Preventive Dentistry, Periodontology and Implant Biology Dental School, Aristotle University of Thessaloniki Thessaloniki Greece
6. Division of Periodontology, Department of Dental Medicine Karolinska Institutet Stockholm Sweden