1. Department of Oral Pathology, Faculdade São Leopoldo Mandic Instituto de Pesquisas São Leopoldo Mandic Campinas, São Paulo Brazil
2. Department of Oral and Maxillofacial Diseases, Clinicum, Faculty of Medicine University of Helsinki Helsinki Finland
3. Institute of Biomedicine, Department of Pathology University of Turku and Turku University Hospital Turku Finland
4. Cancer and Translational Medicine Research Unit University of Oulu Oulu Finland
5. Medical Research Centre Oulu University Hospital Oulu Finland
6. Helsinki University Hospital Helsinki Finland