1. Cardiovascular Medicine DivisionHospital of the University of Pennsylvania, Perelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania
2. Perelman School of Medicine, University of Pennsylvania, Penn Cardiovascular Outcomes, Quality, and Evaluative Research Center (CAVOQER) Philadelphia Pennsylvania
3. Corporal Michael J Crescenz Veterans Affairs Medical Center Philadelphia Pennsylvania
4. Leonard Davis Institute of Health Economics, University of Pennsylvania Philadelphia Pennsylvania