1 Department of Internal Medicine, and Program on Policy Evaluation and Learning, University of Texas Southwestern Medical Center, Dallas, Texas (J.M.L.).
2 Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri (K.E.J.M.).
3 Department of Medical Ethics and Health Policy, Perelman School of Medicine, University of Pennsylvania, Philadelphia; and Corporal Michael J. Crescenz Department of Veterans Affairs Medical Center, Philadelphia, Pennsylvania (A.S.N.).