1. Department of Medicine, Division of Cardiology, Emory University School of Medicine, Atlanta, GA, USA
2. Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, USA
3. Department of Community Health and Preventive Medicine, Morehouse School of Medicine, Atlanta, GA, USA
4. National Center for Primary Care, Morehouse School of Medicine, Atlanta, GA, USA
5. Cardiovascular Engineering Inc., Norwood, MA, USA
6. Department of Medicine, University of Mississippi Medical Center, Jackson, MS, USA
7. Division of Epidemiology, School of Public Health, University of California, Berkeley, Berkeley, CA, USA
8. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
9. Department of Medicine, Morehouse School of Medicine, Atlanta, GA, USA