1. Research Unit of Population Health, University of Oulu, Finland
2. Research Unit of Population Health, Department of Cariology, Endodontology and Pedodontics, University of Oulu, Finland
3. Oulu University Hospital and Medical Research Center, Oulu, Finland
4. Research Unit of Health Sciences and Technology, University of Oulu, Finland
5. Department of Oral and Maxillofacial Surgery, Oulu University Hospital, Oulu, Finland
6. Research Unit of Population Health, Department of Periodontology and Geriatric Dentistry, University of Oulu, Finland