1. National Neuromuscular Centre Norway and Department of Neurology, University Hospital of North Norway (UNN), Tromsø, Norway
2. Department of Clinical Medicine, Faculty of Health Sciences, University of Tromsø –The Artic University of Norway, Tromsø, Norway
3. Department of Psychology, Faculty of Health Sciences, University of Tromsø –The Artic University of Norway, Tromsø, Norway
4. Department of Neurology, Sørlandet Hospital Trust, Kristiansand, Norway