1. Department of Oral Pathology, Institute of Dentistry, University of Turku, Turku, Finland
2. Department of Pathology, Turku University Central Hospital, Turku, Finland
3. Department of Otorhinolaryngology - Head and Neck Surgery, Turku University Hospital, Turku, Finland
4. Department of Clinical Research, Biohit HealthCare Oyj, Helsinki, Finland