1. Department of Clinical Medicine; University of Bergen; Bergen Norway
2. Department of Global Public Health and Primary Care; University of Bergen; Bergen Norway
3. Norwegian MS Competence Center; Haukeland University Hospital; Bergen Norway
4. Department of Neurology; Stavanger University Hospital; Stavanger Norway
5. Kristian Gerhard Jebsen Center for MS Research, Department of Clinical Medicine; University of Bergen; Bergen Norway
6. Department of Neurology; Haugesund Hospital; Haugesund Norway
7. Department of Neurology; Molde Hospital; Molde Norway
8. Unit for Applied Clinical Research; Norwegian University of Science and Technology; Trondheim Norway
9. Department of Neurology; Drammen Hospital; Drammen Norway
10. Department of Neurology; Førde Hospital; Førde Norway
11. Department of Epidemiology; Harvard T. H. Chan School of Public Health; Boston MA
12. Department of Nutrition; Harvard T. H. Chan School of Public Health; Boston MA
13. Channing Division of Network Medicine of the Department of Medicine; Brigham and Women's Hospital and Harvard Medical School; Boston MA
14. Norwegian MS Registry and Biobank; Haukeland University Hospital; Bergen Norway