1. Oral Imaging Center; Faculty of Medicine; Katholieke Universiteit Leuven; Leuven; Belgium
2. Department of Oral Diagnosis and Oral Radiology; School of Dentistry; University of Athens; Athens; Greece
3. Department of Radiology; University Hospitals Leuven; Leuven; Belgium
4. Department of Experimental Radiotherapy; University Hospitals Leuven; Leuven; Belgium
5. Manchester Academic Health Sciences Centre; School of Dentistry; University of Manchester; Manchester; UK