1. Department of Medical Ethics and Health Policy and Division of General Internal Medicine, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Crescenz VA Medical Center, and Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania
2. Division of General Internal Medicine, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Crescenz VA Medical Center, and Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania