1. Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
2. Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
3. Department of Otorhinolaryngology – Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
4. Research Program in Systems Oncology, Faculty of Medicine, University of Helsinki, Helsinki, Finland
5. Research Programmes Unit, Translational Cancer Medicine, University of Helsinki, Helsinki, Finland
6. Department of Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
7. Department of Oral Pathology and Radiology, University of Turku, Turku, Finland