1. From the Center for Outcomes Research and Evaluation (CORE), New Haven, CT (R.P.D., E.S.S., H.M.K.); Department of Emergency Medicine (R.P.D., B.S., G.D.) and Section of Cardiovascular Medicine (C.S., E.S.S., H.M.K.), Yale University School of Medicine, New Haven, CT; Section of Cardiovascular Medicine and the Robert Wood Johnson Foundation, New Haven, CT (H.M.K.); and Department of Health Policy and Management, Yale School of Public Health, New Haven, CT (H.M.K.).