1. Department of Public Health and Nursing, Faculty of Medicine and Health Sciences Norwegian University of Science and Technology (NTNU) Trondheim Norway
2. Norwegian National Advisory Unit on Ageing and Health Vestfold Hospital Trust Tønsberg Norway
3. Research Centre for Age‐related Functional Decline and Disease Innlandet Hospital Trust Ottestad Norway
4. Institute of Clinical Medicine, Ahus Campus University of Oslo Oslo Norway
5. Health Services Research Unit Akershus University Hospital Lørenskog Norway