1. Institute of Dentistry University of Eastern Finland Kuopio Finland
2. City of Kuopio Health Centre Oral Health Care Services Kuopio Finland
3. Department of Oral and Maxillofacial Surgery Oulu University Hospital Oulu Finland
4. Unit of Oral Health Sciences Medical Research Center Oulu (MRC Oulu) Oulu University Hospital and University of Oulu Oulu Finland
5. Department of Public Health Promotion Finnish Institute for Health and Welfare Helsinki Finland
6. Department of Public Health and Department of Food and Nutrition University of Helsinki Helsinki Finland
7. Department of Oral and Maxillofacial Diseases Kuopio University Hospital Kuopio Finland
8. Public Health Evaluation and Projection Unit Finnish Institute for Health and Welfare Helsinki Finland