1. Department of Biomaterials; Göteborg University; Göteborg Sweden
2. Department of Prosthodontics; Malmö University; Malmö Sweden
3. Department of Oral& Maxillofacial Surgery; NU Hospital Group; Trollhättan Sweden
4. Department of Prosthetic Dentistry/Dental Material Science; University of Göteborg; Göteborg Sweden
5. The Brånemark Clinic; Public Dental Health Service; Göteborg Sweden
6. Department of Oral and Maxillofacial Surgery; Göteborg University; Göteborg Sweden