1. Faculty of Medicine and Health, School of Medical Sciences, Örebro University, Örebro, Sweden
2. Department of Neurology and Rehabilitation, Central Hospital Karlstad, Karlstad, Sweden
3. Department of Neurology, Faculty of Medicine and Health, School of Medical Sciences, Örebro University, Örebro, Sweden
4. Division of Medicine, Department of Neurology, Akershus University Hospital, Lørenskog, Norway
5. Department of Internal Medicine, Central Hospital, Karlstad, Sweden