1. From the Duke Clinical Research Institute (K.E.B., C.J., A.D.D., N.C.H., E.D.P., A.F.H.) and Department of Medicine (A.D.D., E.D.P., A.F.H.), Duke University School of Medicine, Durham, NC; Ahmanson-University of California at Los Angeles Cardiomyopathy Center, University of California (G.C.F.); Feinberg School of Medicine, Northwestern University, Chicago, IL (C.W.Y.); Veterans Affairs Palo Alto Health Care System, CA (P.A.H.); Stanford University, CA (P.A.H.); and Brigham and Woman’s Hospital...