1. Department of Oral and Maxillofacial Diseases, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
2. Department of Otorhinolaryngology – Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
3. Department of Pathology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
4. Research Programs Unit, Translational Cancer Biology, University of Helsinki, Helsinki, Finland
5. Department of Oral Pathology and Radiology, Institute of Dentistry, University of Turku, Turku, Finland
6. HUS Medical Imaging Center, Department of Radiology, Helsinki University Hospital, Helsinki, Finland