1. H Littbrand, PT, BSc, is Research Assistant, Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University, Umeå, Sweden
2. E Rosendahl, PT, MSc, is PhD Student, Department of Community Medicine and Rehabilitation, Geriatric Medicine and Physiotherapy, Umeå University, SE-901 87 Umeå, Sweden
3. N Lindelöf, PT, MSc, is PhD Student, Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University, and PhD Student, Department of Health Sciences, Physiotherapy Unit, Luleå University of Technology, Boden, Sweden
4. L Lundin-Olsson, PT, PhD, is Associate Professor, Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University
5. Y Gustafson, MD, PhD, is Professor and Head of Department, Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University
6. L Nyberg, PT, PhD, is Professor, Department of Health Sciences, Physiotherapy Unit, Luleå University of Technology