1. Norwegian National Centre for Ageing and Health, Vestfold Hospital Trust, Tønsberg, Norway
2. Faculty of Medicine, University of Oslo, Oslo, Norway
3. Centre for Age Related Functional Decline and Diseases (AFS) at Innlandet Hospital Trust, Hamar, Norway
4. Department of Health Sciences in Gjøvik, Norwegian University of Science and Technology (NTNU), Gjøvik, Norway
5. Department of Public Health Science, Ås, Norway, Norwegian University of Life Sciences, Ås, Norway
6. Department of Bachelor of Nursing, Lovisenberg Diaconal University College, Oslo, Norway