1. Mongan Institute for Health Policy, Massachusetts General Hospital, Boston2Department of Medicine, Massachusetts General Hospital, Boston4Department of Medicine, Harvard Medical School, Boston, Massachusetts
2. Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester7Center for Healthcare Organization and Implementation Research, Bedford Veterans Affairs Medical Center, Bedford, Massachusetts
3. Mongan Institute for Health Policy, Massachusetts General Hospital, Boston3Department of Psychiatry, Massachusetts General Hospital, Boston5Department of Psychiatry, Harvard Medical School, Boston, Massachusetts
4. The Nielsen Company, New York, New York