1Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, and
2Department of Physiotherapy, Karolinska University Hospital Huddinge, Huddinge, Sweden
3Clinical Services, Department of Geriatrics, St. Olav University Hospital, Trondheim, and
4Department of Neuroscience, Norwegian University of Science and Technology, and
5Faculty of Health Science, Oslo and Akershus University College, Oslo, Norway
6Department of Research and Innovation, University College Sjaelland, Naestved, and
7University of Southern Denmark, Odense, Denmark
8Faculty of Health Education and Social Work, Sør-Trøndelag University College, Trondheim, Norway
9Department of Neuroscience, Uppsala University, Uppsala, Sweden