1. Department of Medical Physics; University of Wisconsin Atherosclerosis Imaging Research Program; Madison Wisconsin USA
2. Research Design and Statistics Unit; University of Wisconsin Schools of Nursing, Medicine, and Public Health; Madison Wisconsin USA
3. Department of Medicine, Division of Cardiovascular Medicine; University of Wisconsin Atherosclerosis Imaging Research Program; Madison Wisconsin USA
4. Department of Neurological Surgery; University of Wisconsin School of Medicine and Public Health; Madison Wisconsin USA