1. Department of Immunology and Transfusion Medicine; Faculty of Medicine; University of Oslo; Oslo University Hospital Rikshospitalet; Oslo Norway
2. Institute of Clinical Medicine; Faculty of Medicine; University of Oslo; Oslo Norway
3. Department of Neurology; Akershus University Hospital; Lørenskog Norway
4. Department of Clinical Medicine; University of Bergen; Bergen Norway
5. Department of Neurology; Haukeland University Hospital; Bergen Norway