1. Department of Health Policy & Management, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania
2. Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts
3. Division of General Internal Medicine and Primary Care, Brigham and Women’s Hospital, Boston, Massachusetts
4. Mathematica Policy Research, Baltimore, Maryland
5. Division of Cardiology, Brigham and Women’s Hospital, Boston, Massachusetts
6. Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Boston, Massachusetts