| Affiliation: | 1. Department of Dentistry, University of Oulu, , Oulu, Finland;2. Medical Research Center Oulu, , Oulu, Finland;3. Institute of Dentistry, University of Helsinki, , Helsinki, Finland;4. Department of Otorhinolaryngology, Helsinki University Central Hospital and University of Helsinki, , Helsinki, Finland;5. Department of Otorhinolaryngology, Head and Neck Surgery, Turku University Hospital and University of Turku, , Turku, Finland;6. Department of Pathology, University of Oulu, , Oulu, Finland;7. Oulu University Hospital, , Oulu, Finland |
