Funding for this research was provided by:
Deutsches Zentrum für Herz-Kreislaufforschung (81Z2700202)
Deutsche Forschungsgemeinschaft (HA 3423/5-1)
Text and Data Mining valid from 2019-06-11
Received: 18 October 2018
Accepted: 3 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The study protocol was approved by the Competence Network & Registry for Congenital Heart Defects, Germany.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.