1. Department of Biomaterials; University of Gothenburg; Sweden
2. Department of Prosthodontics; University of Malmö; Sweden
3. Private practice; Rome Italy
4. Department of Periodontics; The University of Texas Health Science Center; San Antonio TX USA
5. Research cluster Periodontology, Oral implantology, removable and implant prosthodontics; Dental School University hospital, Faculty of Medicine and Health sciences, University of Ghent; Ghent Belgium