1. Institute of Dentistry; University of Eastern Finland; Kuopio Finland
2. Department of Oral and Maxillofacial Diseases; Kuopio University Hospital; Kuopio Finland
3. Research Unit of Oral Health Sciences; University of Oulu; Oulu Finland
4. Medical Research Center Oulu; Oulu University Hospital and University of Oulu; Oulu Finland
5. Department of Oral and Maxillofacial Surgery; Oulu University Hospital; Oulu Finland
6. Center for Life Course Health Research; University of Oulu; Oulu Finland
7. Unit of Primary Health Care; Oulu University Hospital; Oulu Finland
8. Teaching Health Centre; City of Oulu Finland