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. Leeds Test Objects Ltd.; Boroughbridge United Kingdom
4. Department of Radiology; University Hospitals Leuven; Leuven Belgium
5. Department of Experimental Radiotherapy; University Hospitals Leuven; Leuven Belgium
6. School of Dentistry; University of Manchester, Manchester Academic Health Sciences Centre; Manchester United Kingdom