1. Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, NTNU-Norwegian University of Science and Technology, Trondheim, Norway
2. Department of Neurology, Akershus University Hospital, Lørenskog, Norway
3. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
4. Department of Health Services Research, Akershus University Hospital, Lørenskog, Norway
5. Department of Medical Quality Registries, St. Olavs Hospital, Trondheim, Norway