1. Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway;
2. Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway;
3. Faculty of Medicine, University of Oslo, Oslo, Norway;
4. Faculty of Health Sciences, Department of Occupational Therapy, Prosthetics and Orthotics, OsloMet – Oslo Metropolitan University, Oslo, Norway;
5. Norwegian Institute of Public Health, Oslo, Norway;
6. Centre for Old Age Psychiatric Research, Innlandet Hospital Trust, Ottestad, Norway