1. Department of Psychology, Faculty of Health Sciences, The Arctic University of Norway, Tromsø, Norway
2. Department of Psychology, University of Oslo, Oslo, Norway
3. Department of Neurology, Akershus University Hospital, Lørenskog, Norway
4. Department of Neurology, University Hospital of North Norway, Tromsø, Norway
5. Institute of Clinical Medicine, University of Bergen, Norway
6. Department of Clinical Molecular Biology (EpiGen), University of Oslo and Akershus University Hospital, Lørenskog, Norway
7. Institute of Clinical Medicine, University of Oslo, Oslo, Norway