1. Department of Psychology, Center for Lifespan Changes in Brain and Cognition, University of Oslo, Oslo, Norway
2. Department of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
3. Oslo Delirium Research Group, Department of Geriatric Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
4. Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
5. Centre for Old Age Psychiatric Research, Innlandet Hospital Trust, Ottestad, Norway
6. Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
7. Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway
8. Department of Neurology, Oslo University Hospital, Oslo, Norway
9. Department of surgery, Diakonhjemmet Hospital, Oslo, Norway
10. Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
11. Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
12. Department of Molecular Neuroscience, UCL Institute of Neurology, Gower Street, London, UK