1. From the Section of Advanced Heart Failure and Transplantation, Division of Cardiology (C.K.M., L.A.A., J.L.), Colorado Cardiovascular Outcomes Research Consortium (C.K.M., L.A.A., D.D.M.) and Division of General Internal Medicine (C.N., D.D.M.), University of Colorado School of Medicine, Aurora; University of Colorado School of Nursing, Aurora (J.J.); and Division of General Internal Medicine, Mayo Clinic, Rochester, MN (K.M.S.).