1. Oral and Maxillofacial Surgery; Ziekenhuis Oost-Limburg, Campus St. Jan; Genk Belgium
2. Faculty of Medicine; Hasselt University; Diepenbeek Belgium
3. Clinic for Cranio-Maxillofacial Surgery; University Hospital of Zurich; Zurich Switzerland
4. Department of Oral Health Sciences; KU Leuven & Oral and Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
5. Oral and Maxillofacial Surgery, Faculty of Medicine; Gent University; Gent Belgium