1. Schulich School of Medicine & Dentistry University of Western Ontario London Ontario Canada
2. Department of Periodontics and Community Dentistry, College of Dentistry King Saud University Riyadh Saudi Arabia
3. Dental Public Health, Faculty of Dentistry University of Toronto Toronto Ontario Canada
4. Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
5. School of Public Health and Health Systems University of Waterloo Waterloo Ontario Canada
6. Public Health Ontario Health Promotion Chronic Disease and Injury Prevention Department Toronto Ontario Canada