Changing Prevalence of Severe Congenital Heart Disease: Results from the National Register for Congenital Heart Defects in Germany - Pfitzer, C.; Helm, P.C.; Ferentzi, H.; Rosenthal, L.M.; Bauer, U.M.M.; Berger, F.; Schmitt, K.R.L. (The Thoracic and Cardiovascular Surgeon, 2018)