1. Unit of Oral Health Sciences Research; University of Oulu; Oulu Finland
2. Medical Research Center Oulu; Oulu University Hospital; University of Oulu; Oulu Finland
3. Dental training clinic; Social and Health services; City of Oulu Finland
4. Social and Health Centre of Kuopio; Kuopio Finland
5. Institute of Dentistry; University of Eastern Finland; Kuopio Finland
6. Kuopio Research Center of Geriatric Care; University of Eastern Finland; Kuopio Finland
7. Department of Social Pharmacy; School of Pharmacy; University of Eastern Finland; Kuopio Finland
8. Department of Oral and Maxillofacial Diseases; Kuopio University Hospital; Kuopio Finland