1. Department of Otorhinolaryngology—Head and Neck SurgeryTurku University Hospital and University of Turku Turku Finland
2. Department of OncologyUniversity of Turku and Turku University Hospital Turku Finland
3. Department of BiostatisticsTurku University Hospital and University of Turku Turku Finland
4. Department of PathologyHelsinki University Hospital Helsinki Finland
5. Research Programs Unit—Translational Cancer Biology ProgramUniversity of Helsinki Helsinki Finland
6. Department of Oral PathologyInstitute of Dentistry, University of Turku Turku Finland
7. Department of PathologyUniversity of Turku and Turku University Hospital Turku Finland