1. Oslo Delirium Research Group, Department of Geriatric Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
2. Research Group for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
3. Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
4. Department of Anesthesiology, Oslo University Hospital, Oslo, Norway
5. Institute of Clinical Medicine, University of Oslo, Oslo, Norway
6. Department of Urology, Oslo University Hospital, Oslo, Norway
7. Department of Orthopedic Surgery, Oslo University Hospital, Oslo, Norway
8. Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
9. Department of Clinical Sciences, Lund University, Lund, Sweden
10. Memory Clinic, Skåne University Hospital, Lund, Sweden
11. Clinical Neurochemistry Lab, Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
12. Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
13. Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Tberg, Tønsnerg, Norway