1. Unit of Prosthetic Dentistry/BIOMAT Research Group; Department of Oral Health Sciences; KU Leuven; Leuven Belgium
2. Unit of Operative Dentistry; Department of Oral Health Sciences; Faculty of Medicine; KU Leuven; Leuven Belgium
3. Unit of Periodontology; Department of Oral Health Sciences; Faculty of Medicine; KU Leuven; Leuven Belgium