1. Department of Physiotherapy, Oslo University Hospital (OUS), Oslo, Norway
2. Department of Geriatric Medicine, OUS, Oslo, Norway
3. Institute of Clinical Medicine, University of Oslo (UiO), Oslo, Norway
4. Department of Neurology, OUS, Oslo, Norway
5. Department of Internal Medicine, Central Hospital, Karlstad, Sweden
6. Department of Neurology, Central Hospital, Karlstad and Örebro, Sweden
7. School of Medical Sciences, Örebro University, Örebro, Sweden
8. Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology, Trondheim, Norway
9. Department of Geriatric Medicine, Bærum Hospital, Vestre Viken Trust, Bærum, Norway
10. Norwegian National Advisory Unit on Ageing and Health, Vestfold Hospital Trust, Tönsberg, Norway
11. Department of Interdisciplinary Health Sciences, UiO, Oslo, Norway