1Department of Geriatric Psychiatry, Akershus University Hospital, Sykehusveien 25, 1478 Lørenskog, Norway
2Faculty of Medicine, University of Oslo, Oslo, Norway
3Department of Neurology, University Hospital of North Norway, Tromsø, Norway
4Department of Psychology, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromsø, Norway
5Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, SE5 9NU UK
6Department of Neurology, Akershus University Hospital, Lørenskog, Norway
7Department of Psychology, University of Oslo, Oslo, Norway
8Norwegian National Advisory Unit On Aging and Health, Vestfold Hospital Trust, Tønsberg, Norway
9Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
10Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
11Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
12Department of Old Age Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, SE5 8AF UK
13Institute of Clinical Medicine, University of Oslo, Campus Ahus, Oslo, Norway
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