1. Institute of Clinical Medicine/Neurology, University of Eastern Finland, Kuopio, Finland
2. Neurocenter, Neurology, Kuopio University Hospital, Kuopio, Finland
3. Department of Clinical Radiology, Kuopio University Hospital, Kuopio, Finland
4. Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland
5. Division of Clinical Geriatrics, Center for Alzheimer Research, NVS, Karolinska Institutet, Stockholm, Sweden
6. Turku University Hospital, Turku, Finland
7. Turku PET Centre, University of Turku, Turku, Finland
8. Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
9. Finnish Institute of Occupational Health, Helsinki, Finland
10. Department of Neurology, Kuopio University Hospital, Kuopio, Finland
11. Department of Medicine, Geriatric Clinic, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland
12. Center for Life Course Health Research/Geriatrics, Faculty of Medicine, University of Oulu, Oulu, Finland
13. Medical Research Center Oulu, Oulu University Hospital and Oulu City Hospital, Oulu, Finland
14. Department of Public Health, University ofHelsinki, Finland
15. South Ostrobothnia Central Hospital, Seinäjoki, Finland
16. Department of Neurosciences and Preventive Medicine, Danube-University Krems, Austria
17. Diabetes Research Group, King Abdulaziz University, Jeddah, Saudi Arabia