1. Department Periodontology & Oral Implantology; Dental School, Faculty Medicine and Health Sciences; Ghent University Belgium; Ghent Belgium
2. Oral Health Research Group ORHE; Faculty of Medicine and Pharmacy; Vrije Universiteit Brussel; Brussels Belgium
3. Department of Educational Sciences EDWE-LOCI; Faculty of Psychology and Educational Sciences; Vrije Universiteit Brussel; Brussels Belgium
4. Section Implantology & Periodontology; Department of Dentistry; Radboudumc; Nijmegen The Netherlands