1. Department of Oral and Maxillofacial Diseases, Clinicum, University of Helsinki, Helsinki, Finland
2. Hematology Research Unit, Department of Hematology, University of Helsinki and Helsinki University Central Hospital Comprehensive Cancer Center, Helsinki, Finland
3. Clinical Pathology Department, National Cancer Institute, Cairo University, Cairo, Egypt
4. Department of Otorhinolaryngology, Helsinki University Hospital, Helsinki, Finland
5. Department of Internal Medicine, Clinicum, University of Helsinki, Helsinki, Finland
6. Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
7. Oral and Maxillofacial Unit, Tampere University Hospital, Tampere, Finland
8. Cancer and Translational Medicine Research Unit, University of Oulu, Oulu, Finland
9. Medical Research Center, Oulu University Hospital, Oulu, Finland