1. Oral Health Sciences Kristianstad University Kristianstad Sweden
2. Department of Health Blekinge Institute of Technology Karlskrona Sweden
3. Division of Restorative Dentistry & Periodontology Dublin Dental University Hospital, Trinity College Dublin Dublin Ireland
4. Institute of Health University of Corsica Corte France
5. Private Practice Hanau Germany
6. Department of Prosthodontics University Medical Center Goettingen Germany