1. Department of Oral Medicine and Diagnostic Sciences King Saud University Riyadh Saudi Arabia
2. Department of Pathology University of Helsinki Helsinki Finland
3. Department of Oral and Maxillofacial Diseases Clinicum Faculty of Medicine University of Helsinki Helsinki Finland
4. Institute of Dentistry School of Medicine Faculty of Health Sciences University of Eastern Finland Kuopio Finland
5. Oral Health Teaching Clinic and Department of Oral and Maxillofacial Diseases Kuopio University Hospital Kuopio Finland
6. Medical Informatics and Data Analysis Research Group University of Oulu Oulu Finland
7. Institute of Biomedicine, Pathology University of Turku Turku Finland
8. Faculty of Dentistry University of Misurata Misurata Libya
9. Cancer and Translational Medicine Research Unit Medical Research Center Oulu University of Oulu and Oulu University Hospital Oulu Finland