1. Department of BioSciences, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, Norway
2. Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, Bergen, Norway
3. Gade Laboratory for Pathology, Department of Clinical Medicine, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
4. Centre for Cancer Biomarkers (CCBIO), Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
5. Department of Pathology, Haukeland University Hospital, Bergen, Norway
6. Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway