1. Department of Neurosurgery, Oslo University Hospital – Rikshospitalet, Oslo, Norway
2. Department of Radiology and Nuclear Medicine, Oslo University Hospital – Rikshospitalet, Oslo, Norway
3. Department of Medical Genetics, Oslo University Hospital – Rikshospitalet, Oslo, Norway
4. Department of Neurosurgery, Stavanger University Hospital, Stavanger, Norway
5. Department of Quality and Health Technology, Faculty of Health Sciences, University of Stavanger, Stavanger, Norway