1 From the Department of Emergency Medicine (K.E.K.) and the Division of General Medicine, Department of Internal Medicine (J.Z.A.), University of Michigan Medical School, the Center for Healthcare Outcomes and Policy (K.E.K.), the Institute for Healthcare Policy and Innovation (K.E.K., J.Z.A.), and the Gerald R. Ford School of Public Policy (J.Z.A.), University of Michigan, and the Department of Health Management and Policy, University of Michigan School of Public Health (J.Z.A.) - all in Ann Arbor.