Affiliation: | 1. Department of Clinical Chemistry, University Central Hospital of Helsinki, Finland 2. Department of Oncology, University Central Hospital of Helsinki, Finland 3. Department of Otorhinolaryngology, University Central Hospital of Helsinki, Finland 4. Department of Radiation, Physics University of Lund, Sweden 5. Department of Pathology, University of Helsinki, Finland 6. Department of Physics, University of Helsinki, Finland
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