1. Department of Biomaterials, Institute of Clinical Sciences; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
2. Department of Prosthodontics; University of Malmö; Scania Sweden
3. The Brånemark Clinic, Public Dental Health Service; Gothenburg Sweden
4. Department of Prosthodontics, Institute of Odontology, Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
5. Department of Pathology and Genetics; Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden