1. Department of Periodontology; The Institute for Postgraduate Dental Education; Jönköping Sweden
2. Department of Biomaterials; Institute for Clinical Sciences; Göteborg University; Göteborg Sweden
3. Oral Surgery; Faculty of Dentistry; University of Bergen; Bergen Norway
4. Prosthodontics; Faculty of Dentistry; University of Bergen; Bergen Norway
5. Department of Oral & Maxillofacial Surgery; Borås County Hospital; Borås Sweden
6. Department of Oral & Maxillofacial Surgery; Gävle County Hospital; Gävle Sweden
7. Department of Oral & Maxillofacial Surgery; Halmstad County Hospital; Halmstad Sweden
8. Department of Prosthodontics; Halmstad County Hospital; Halmstad Sweden