1. Division of Cardiology; Johns Hopkins University School of Medicine; Baltimore MD USA
2. Johns Hopkins Biostatistics Center; Johns Hopkins Bloomberg School of Public Health; Baltimore MD USA
3. Division of Cardiovascular Medicine; University of Michigan; Ann Arbor MI USA
4. Department of Cardiovascular Medicine; Cleveland Clinic; Cleveland OH USA
5. SUNY Health Sciences Center; Stony Brook University; Stony Brook NY USA
6. Albert Einstein College of Medicine; Bronx NY USA