1. Department of Medicine, Division of General Medical Sciences Washington University School of Medicine in St. Louis St. Louis Missouri USA
2. Institute for Informatics Washington University School of Medicine in St. Louis St. Louis Missouri USA
3. Center for Health Equity Research and Promotion (CHERP) Corporal Michael Crescenz VA Medical Center Philadelphia Pennsylvania USA
4. Division of General Internal Medicine, Department of Medicine University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
5. Leonard Davis Institute of Health Economics University of Pennsylvania Philadelphia Pennsylvania USA