1. Department of Prosthodontics; Faculty of Dentistry; University of Toronto; Toronto ON Canada
2. Discipline of Periodontology; University of Toronto; Toronto ON Canada
3. Department of Periodontics; School of Dentistry; Tel Aviv University; Tel Aviv Israel
4. Matrix Dynamics; University of Toronto; Toronto ON Canada
5. University of Tromsø Faculty of health Sciences; Clinical Dentistry; Tromsø Norway