1. Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
2. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
3. Division of Biostatistics, Washington University in St Louis, St Louis, Missouri
4. Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, Illinois
5. Institute for Minority Health Research, College of Medicine, University of Illinois at Chicago, Chicago
6. Department of Economics, Georgia Southern University, Statesboro