1. The Health Services Research Unit (HØKH) Akershus University Hospital HF Lørenskog Norway
2. Institute for Global Health BCEPSUniversity of Bergen Bergen Norway
3. Department of Neurology Akershus University Hospital HF Lørenskog Norway
4. Department of Neurology Haukeland University Hospital HF Bergen Norway
5. Centre for age‐related medicine Stavanger University Hospital Stavanger Norway
6. Institute of clinical medicine University of Bergen Bergen Norway