1 Division of Cardiology, Department of Medicine, Duke University, Durham, NC, USA.
2 Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA; WJB Dorn VA Medical Center, Columbia, SC, USA.
3 Marie-Josée and Henry R. Kravis Center for Cardiovascular Health, Mount Sinai School of Medicine, USA.
4 Section of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA; Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA. Electronic address: virani@bcm.edu.