1. From the Division of Cardiology, Mayo Clinic, Rochester, MN (R.Z., B.A.B., S.F.M., M.M.R.); Duke Clinical Research Institute, Durham, NC (S.E.M., A.F.H.); Massachusetts General Hospital, Boston (G.D.L., M.J.S.); Michael E. DeBakey VA Medical Center and Department of Medicine, Baylor College of Medicine, Houston, TX (A.D.); Cardiology Unit, University of Vermont College of Medicine, Burlington (M.L.); and Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Boston, MA (E.B.).