1. Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
2. Vestfold Hospital Trust, Norwegian National Advisory Unit on Ageing and Health, Tønsberg, Norway
3. The Research Centre for Age Related Functional Decline and Diseases, Innlandet Hospital Trust, Ottestad, Norway
4. Institute of Clinical Medicine, Campus Ahus, University of Oslo, Oslo, Norway
5. Health Services Research Unit, Akershus University Hospital, Lørenskog, Norway
6. Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway
7. Institute for Clinical Medicine, University of Oslo, Oslo, Norway
8. Department of Global Public Health and Primary Care, Centre for Elderly and Nursing Home Medicine, University of Bergen, Norway
9. Municipality of Bergen, Bergen, Norway