1. Corporal Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania
2. Center for Health Equity Research and Promotion, Philadelphia, Pennsylvania
3. Perelman School of Medicine, University of Pennsylvania, Philadelphia
4. Abramson Cancer Center, University of Pennsylvania, Philadelphia
5. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia
6. Herbert Irving Comprehensive Cancer Center, the College of Physicians and Surgeons at Columbia University, New York, New York