1. Department of Medical Ethics and Health Policy, University of Pennsylvania Perelman School of Medicine, Philadelphia
2. Division of Chronic Disease Prevention, Philadelphia Department of Public Health, Philadelphia, Pennsylvania
3. Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia
4. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
5. Department of Health Policy and Management, Harvard T.H. Chan School of Public Health, Boston, Massachusetts