1. Center for Oral Rehabilitation; Public Dental Services; Falun Sweden
2. Department of Surgical Sciences, Oral and Maxillofacial Surgery; Medical Faculty; Uppsala University; Uppsala Sweden
3. Public Dental Services; Gävleborg Sweden
4. Center for Clinical Research; Uppsala University/Region Gävleborg; Gävle Sweden
5. Center for Public Dental Services; Falun Sweden
6. School of Education, Health and Social Studies; Falun Sweden