1. Reynolds Oklahoma Center on Aging, Donald W. Reynolds Department of Geriatric Medicine, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
2. Department of Cardiology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
3. Department of Biostatistics and Epidemiology, University of Oklahoma Health Sciences Center (OUHSC), Oklahoma City, OK, USA
4. Department of Cardiology, NorthShore University HealthSystem, Evanston, IL, USA
5. Veterans Affairs Medical Center, Oklahoma City, OK, USA