1. Department of Neurology, Akershus University Hospital, Lørenskog, Norway
2. Faculty Division Akershus University Hospital, University of Oslo, Oslo, Norway
3. Center for the Study of Human Cognition, Department of Psychology, University of Oslo, Oslo, Norway
4. Centre for Age-Related Medicine, Psychiatry Clinic, Stavanger University Hospital, Stavanger, Norway
5. Department of Neurology, Oslo University Hospital Rikshospitalet, Oslo, Norway