1. Department of Radiology; Stavanger University Hospital; Stavanger Norway
2. Radiologic Research Group; Stavanger University Hospital; Stavanger Norway
3. Department of Radiology and Nuclear Imaging; Oslo University Hospital - Rikshospitalet; Oslo Norway
4. Department of Neurology; Stavanger University Hospital; Stavanger Norway
5. Neuroscience Research Group; Stavanger University Hospital; Stavanger Norway
6. Department of Clinical Medicine; Haukeland University Hospital; Bergen Norway