1. Department of Neurology, Sørlandet Hospital, Arendal
2. Department of Neurology, Sørlandet Hospital, Kristiansand
3. Institute of Clinical Medicine, University of Bergen, Bergen
4. Department of Rehabilitation, Sørlandet Hospital, Kristiansand
5. Department of Paediatrics and Rehabilitation, Sørlandet Hospital, Arendal
6. Department of Laboratory Medicine, Children’s and Women’s Health, NTNU, Trondheim, Norway