1. Department of Oncology and Radiotherapy, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Kajaanintie 50, 90220 Oulu, Finland,
2. Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Kajaanintie 50, 90220 Oulu, Finland,
3. Department of Pathology, Institute of Diagnostics, Medical Research Center Oulu, Oulu University Hospital, Kajaanintie 50, 90220 Oulu, Finland,
4. Biocenter Oulu, University of Oulu, Kajaanintie 50, 90220 Oulu, Finland,
5. Department of Oncology, Tampere University Hospital, Teiskontie 35, 33521 Tampere, Finland,
6. Department of Oncology and Radiotherapy, Central Finland Central Hospital, Keskussairaalantie 19, 40620 Jyväskylä, Finland,
7. Department of Pathology, FIMLAB, Tampere University Hospital, Teiskontie 35, 33521 Tampere, Finland,
8. Department of Medicine, Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland,
9. Department of Clinical Pathology and Forensic Medicine, Cancer Center of Eastern Finland, University of Eastern Finland, Puijonlaaksontie 2, 70210 Kuopio, Finland,
10. Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland,
11. Department of Pathology, Central Finland Central Hospital, Keskussairaalantie 19, 40620 Jyväskylä, Finland,
12. Department of Neurosurgery, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Kajaanintie 50, 90220 Oulu, Finland and
13. Department of Otorhinolaryngology, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Kajaanintie 50, 90220 Oulu, Finland