1. Institute of Dentistry University of Eastern Finland Kuopio Finland
2. Institute of Dentistry University of Turku Turku Finland
3. Institute of Medicine Center for Life Course Health Research University of Oulu Turku Finland
4. Department of Community Dentistry University of Turku Turku Finland
5. Turku Clinical Research Centre Turku University Hospital Turku Finland
6. Department of Oral and Maxillofacial Diseases Kuopio University Hospital Kuopio Finland
7. Public Health Evaluation and Projection Unit Finnish Institute for Health and Welfare Helsinki Finland