1. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
2. Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
3. Central Finland Hospital, Department of Medicine, Jyväskylä, Finland
4. Kuopio Research Centre of Geriatric Care, University of Eastern Finland, Kuopio, Finland
5. Department of Neurology, Kuopio University Hospital, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland