1. North Texas VA Health Care System, Dallas, TX, USA
2. Department of Surgery, Division of Vascular Surgery, UT Southwestern Medical Center, Dallas, TX, USA
3. Department of Population and Data Sciences, UT Southwestern Medical Center, Dallas, TX, USA
4. Department of Medicine, Division of Cardiology, UT Southwestern Medical Center, Dallas, TX, USA
5. Durham VA Medical Center, Durham, GA, USA
6. Department of Medicine, Division of Cardiology, Duke University School of Medicine, Durham, GA, USA
7. Minneapolis Heart Institute, Minneapolis, MN, USA