1. Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison
2. Collaborative Health Studies Coordinating Center, Department of Biostatistics, University of Washington, Seattle
3. Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison
4. Ciccarone Center for the Prevention of Cardiovascular Disease, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, Maryland