1. Institute of Dentistry; University of Oulu; Oulu Finland
2. Cancer and Translational Medicine Research Unit; University of Oulu; Oulu Finland
3. Department of Oral and Maxillofacial Diseases; Kuopio University Hospital; Kuopio Finland
4. Medical Informatics and Statistics Research Group; University of Oulu; Oulu Finland
5. Department of Oral and Maxillofacial Diseases; University of Helsinki; Helsinki Finland
6. Medical Research Center; Oulu University Hospital; Oulu Finland