1. Department of Neuroscience and Physiology; Sahlgrenska Academy; Gothenburg University; Gothenburg Sweden
2. Department of Neurology; Haukeland University Hospital; Bergen Norway
3. Department of Neurosciences and Neurology; Mayo Clinic; Jacksonville FL USA
4. Department of Clinical Neuroscience; Center for Molecular Medicine; Karolinska Institutet; Stockholm Sweden
5. Department of Neurology; Oslo University Hospital; Ullevål and University of Oslo; Oslo Norway
6. KG Jebsen Centre for MS Research; Department of Clinical Medicine; University of Bergen; Bergen Norway
7. Norwegian MS Registry and Biobank; Department of Neurology; Haukeland University Hospital; Bergen Norway
8. Department of Psychiatry and Neurochemistry; Sahlgrenska Academy; Gothenburg University; Gothenburg Sweden
9. UCL Institute of Neurology; Queen Square; London UK