1. From the Department of Congenital Heart Disease and Paediatric Cardiology (N.K.B., P.L., F.B., T.K.), Deutsches Herzzentrum Berlin, Berlin, Germany; Department of Imaging Sciences (P.B.), King’s College London, London, United Kingdom; Department of Heart- Thorax- and Transplantation Medicine (S.S.), Medical University Hannover, Hannover, Germany; Institute of Biostatistics (S.K.), University of Magdeburg, Magdeburg, Germany; Institute of Child Health (R.H.A.), Cardiac Unit, University College London...