1. Department of Neurology Oslo University Hospital Oslo Norway
2. Department of Neurology Akershus University Hospital Nordbyhagen Norway
3. Experimental and Clinical Pharmacology, Institute of Medical Biology UiT The Arctic University of Norway Tromsø Norway
4. Department of Laboratory Medicine, Division of Diagnostic Services University Hospital of Northern Norway Tromsø Norway
5. Department of Clinical Medicine UiT The Arctic University of Norway Tromsø Norway
6. Institute of Clinical Medicine University of Oslo Oslo Norway
7. Unicare Fram Rehabilitation Centre Rykkinn Norway
8. Ringen Rehabilitation Centre Moelv Norway
9. Department of Neurology University Hospital of Northern Norway Tromsø Norway
10. Division of Neurology, Department of Clinical Sciences Lund University, Skåne University Hospital Lund Sweden
11. Center for Psychopharmacology Diakonhjemmet Hospital Oslo Norway
12. Institute of Oral Biology University of Oslo Oslo Norway