1. Department of RadiologyLeiden University Medical CenterLeiden The Netherlands
2. Geriatrics DepartmentAP‐HP, Broca HospitalParis75013 France
3. Université Paris DescartesSorbonne Paris VParis EA4468, 75006 France
4. Department of Clinical Neuroscience Karolinska InstituteStockholm Sweden
5. Biospective IncMontreal Quebec Canada
6. Intramural Research Program of the National Institute on AgingBethesda Maryland
7. Icelandic Heart AssociationKopavogur Iceland