1. Clinical and Translational Neuroscience Unit, Feil Family Brain and Mind Research Institute, Weill Cornell Medical College, New York, New York
2. Department of Neurology, Weill Cornell Medical College, New York, New York
3. The Icelandic Heart Association, Kopavogur, Iceland
4. Department of Medicine, Weill Cornell Medical College, New York, New York
5. Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Bethesda, Maryland
6. The University of Iceland, Reykjavik, Iceland
7. Cardiovascular and Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland