1. From the Adult Congenital Heart Center, Montreal Heart Institute, Université de Montréal, Montreal, Quebec (F.-P.M., P.K.); Boston Adult Congenital Heart Service, Children’s Hospital Boston and Brigham and Women’s Hospital, Boston, MA (M.Z.G., A.R.O., A.M.V., M.J.L., P.K.); Oregon Health and Science University, Portland, OR (C.S.B.); Ahmanson/UCLA Adult Congenital Heart Disease Center, Los Angeles, CA (J.A.); University of Colorado, Denver, CO (J.D.K.); Medical College of Wisconsin, Milwaukee, WI (M...