1. Department of Medicine
2. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
3. Department of Radiology, and
4. Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
5. Department of Medicine, University of California at Los Angeles, Los Angeles, California
6. Los Angeles Biomedical Research Institute at Harbor-UCLA, Los Angeles, California; and
7. Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland