1. Department of Nursing Science, University of Eastern Finland, Kuopio, Finland
2. NeuroCentre, Neurology, Kuopio University Hospital, Kuopio, Finland
3. Department of Neurology, School of Medicine, Institute of Clinical Medicine, Kuopio, Finland
4. Department of Geriatrics, Helsinki University Hospital, Helsinki, Finland
5. Department of Neurosciences, Faculty of Medicine, University of Helsinki, Helsinki, Finland
6. Science Service Center, Kuopio University Hospital, Kuopio, Finland