1. Department of Neurology; Karolinska University Hospital; Stockholm; Sweden
2. Department of Neurology; University Hospital; Linköping; Sweden
3. Department of Neurology; Molde Hospital HNR; Molde; Norway
4. Department of Clinical Neuroscience; Sahlgrenska University Hospital; Gothenburg; Sweden
5. Department of Geriatric and Rehabilitation; Sundsvall Hospital; Sundsvall; Sweden
6. Department of Neurology; North Sweden University Hospital; Umeå; Sweden
7. Departments of Neuroscience and Neurology; Uppsala University; Uppsala; Sweden
8. Uppsala Science Park; Uppsala; Sweden
9. Department of Neurology; Skåne University Hospital; Lund; Sweden