1. Swedish National Transport Research Institute, Gothenburg, Sweden;
2. Department or Clinical Neuroscience and Rehabilitation, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
3. Department of Geriatric Medicine and Department of Social and Welfare Studies, Linköping University, Linköping, Sweden;
4. Department of Rehabilitation Medicine and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden