1. From the Winters Center for Heart Failure Research and Section of Cardiology (D.A., B.B., K.R., A.D.), Department of Medicine, Baylor College of Medicine, Houston, Tex; the Section of Cardiology (D.A., B.B., K.R., A.D.), Michael E. DeBakey VA Medical Center, Houston, Tex; the University of Texas Health Science Center School of Public Health (W.C.), Houston, Tex; and Houston Center for Quality of Care and Utilization Studies (A.D.), Michael E. DeBakey VA Medical Center, Houston, Tex.