1. Research Unit of Oral Health Sciences, University of Oulu, Oulu, Finland
2. Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
3. Medical Research Centre Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
4. Department of Mathematical Sciences, University of Oulu, Oulu, Finland
5. The Geography Research Unit, University of Oulu, Oulu, Finland
6. Oulu Deaconess Institute Foundation Sr., Department of Sports and Exercise Medicine, Oulu, Finland
7. Center for Life Course Health Research, University of Oulu, Oulu, Finland
8. Centre for Military Medicine, Finnish Defence Forces, Helsinki, Finland