1. Institute of Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway
2. Department of Neurosurgery Oslo University Hospital Oslo Norway
3. Department of Tumor Biology Institute for Cancer Research Oslo University Hospital‐Radiumhospitalet Oslo Norway
4. Department of Neurosurgery Geneva University Hospitals Geneva Switzerland
5. Faculty of Medicine University of Geneva Geneva Switzerland
6. Department of Pathology Oslo University Hospital Oslo Norway
7. LIEDUniversity of Lübeck Jena Germany
8. Department of Pharmacology Medical Faculty University of Latvia Riga Latvia
9. Østfold Hospital Trust Grålum Norway
10. Institute of Medical Biology Faculty of Health Sciences University of Tromsø ‐ The Arctic University of Norway Tromsø Norway