1. From Cedars–Sinai Heart Institute (R.R.M., H.J., T.C., A.T., J.F., D.B., W.C., M.K.) and Cedars–Sinai Medical Center (G.F.) — both in Los Angeles; Rigshospitalet, University of Copenhagen, Copenhagen (K.F.K., O.D.B., N.T.O., L.S.); MedStar Health Research Institute, Washington, DC (F.M.A., A.D.P., N.J.W.); Hackensack University Medical Center and Joseph M. Sanzari Children’s Hospital, Hackensack, NJ (C.E.R., V.J.); Lenox Hill Heart and Vascular Institute of New York (C.A.K.) and Columbia University...