1. Intramural Research Program, Laboratory of Epidemiology and Population Sciences, National Institute on Aging, National Institutes of Health, Bethesda, Maryland
2. Icelandic Heart Association, Kopavogur, Iceland
3. Faculty of Medicine, University of Iceland, Reykjavik, Iceland
4. Hemorrhagic Stroke Research Program, Department of Neurology, Massachusetts General Hospital Stroke Research Center, Harvard Medical School, Boston
5. Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania6Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania
6. Department of Radiology, Leiden University Medical Centre, Leiden, the Netherlands
7. Icelandic Heart Association, Kopavogur, Iceland3Faculty of Medicine, University of Iceland, Reykjavik, Iceland