1. Department of Dentistry and Oral Health; La Trobe Rural Health School; La Trobe University; Bendigo Australia
2. Department of Community Dentistry; Institute of Dentistry; University of Turku; Turku Finland
3. Division of Population & Patient Health; Dental Institute; King's College London; London UK
4. Institute of Dentistry; University of Eastern Finland; Kuopio Finland
5. Department of Oral and Maxillofacial Surgery; Kuopio University Hospital; Kuopio Finland
6. The Living Environment and Health Unit; National Institute for Health and Welfare; Kuopio Finland
7. The Health Monitoring Unit; National Institute for Health and Welfare; Helsinki Finland
8. Department of Oral Development and Orthodontics; Institute of Dentistry; University of Turku; Turku Finland