1. Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
2. Aging Research Center, Karolinska Institutet, Stockholm, Sweden
3. Karolinska Institutet Alzheimer's Disease Research Center, Stockholm, Sweden
4. Department of Chronic Disease Prevention, National Institute for Health and Welfare, Helsinki, Finland
5. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
6. Hospital District of North Karelia, Joensuu, Finland
7. Department of Public Health, University of Helsinki, Helsinki, Finland
8. South Ostrobothnia Central Hospital, Seinäjoki, Finland
9. Department of Neurology, Kuopio University Hospital, Kuopio, Finland