1. Department of Oral and Maxillofacial Surgery; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; University Hospital Ghent; Ghent Belgium
2. Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; University Hospital Ghent; Ghent Belgium
3. Department of Prosthodontics; School of Dentistry; Malmö University; Malmö Sweden