1. Department of Medical Ethics and Health Policy, Center for Health Incentives and Behavioral Economics, Perelman School of Medicine, University of Pennsylvania, Philadelphia
2. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
3. Department of Computer and Information Sciences, Fordham University, Bronx, New York
4. Perelman School of Medicine, Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia
5. Perelman School of Medicine, Division of General Internal Medicine, University of Pennsylvania, Philadelphia
6. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia