1. Group of Morphology, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium.
2. Department of Imaging and Pathology, Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
3. Group of Physiology, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium.