1. Division of Cardiology, Duke University, Durham, NC
2. Duke Clinical Research Institute, Duke University, Durham, NC
3. Center for Heart and Vascular Health, Christiania Care Health System, Newark, DE
4. Division of Cardiology, University of Texas–Southwestern, Dallas, TX
5. St Luke's Mid‐America Heart Institute University of Missouri–Kansas City, Kansas City, MO
6. Division of Cardiology, University of California (Davis), Sacramento, CA