1. Institute of Clinical Medicine, University of Oslo, Norway
2. Norwegian PSC Research Center, Oslo University Hospital, Norway
3. Research Institute of Internal Medicine, Oslo University Hospital, Norway
4. Department of Clinical Medicine, University of Bergen, Norway
5. Department of Neurology, Haukeland University Hospital, Norway
6. Neuroscience Research Group, Stavanger University Hospital, Norway
7. Department of Neurology, Molde Hospital, Norway
8. Unit for Applied Clinical Research, NTNU, Norway
9. Department of Neurology, Innlandet Hospital Trust, Norway
10. Department of Neurology, Drammen Hospital, Norway
11. Department of Neurology, Oslo University Hospital, Norway
12. K.G. Jebsen TREC, University of Tromsø, Norway
13. Previous Biogen, Norway
14. Biogen, Norway
15. Section of Gastroenterology, Oslo University Hospital, Norway
16. Department of Neurology, Akershus University Hospital, Norway