1. Center for Research on Health Care, Division of General Internal Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA
2. Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill
3. School of Nursing and Health Studies, University of Miami, FL
4. Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill
5. Phoenix Veterans Affairs Medical Center, Phoenix, AZ
6. Center for Learning Health Care, Duke Clinical Research Institute, Duke University Medical Center, Durham, NC
7. Division of Medical Oncology, Duke University School of Medicine, Duke University, Durham, NC
8. Center for Health Services Research in Primary Care, Durham Veterans Affairs Medical Center, Durham, NC