1. From the Section of Heart Failure and Cardiac Transplant Medicine, Kaufman Center for Heart Failure, Heart and Vascular Institute (E.Z.G., E.H., R.C.S.), the Cleveland Clinic, Cleveland, Ohio; Case Western Reserve University School of Medicine (E.C.C.), Cleveland, Ohio; University Hospitals Case Medical Center (C.H.C.), Cleveland, Ohio; and the University of Washington (W.C.L.), Seattle, Wash. Dr Chu's current address is Duke University Medical Center, Durham, NC.