1. Department of Oral Biology, Faculty of Dentistry University of Oslo Oslo Norway
2. Department of Pathology Oslo University Hospital, Rikshospitalet Oslo Norway
3. Department of Otorhinolaryngology University Hospital of North Norway Tromsø Norway
4. Department of Tromsø Medical Biology, Faculty of Health Sciences UiT – The Arctic University of Norway Tromsø Norway
5. The Gade Laboratory for Pathology, Department of Clinical Medicine Haukeland University Hospital, University of Bergen Bergen Norway
6. Department of Pathology Haukeland University Hospital Bergen Norway
7. Centre for Cancer Biomarkers (CCBIO), Faculty of Medicine and Dentistry University of Bergen Bergen Norway
8. Department of Oral Pathology, Faculty of Dentistry Gazi University Ankara Turkey