1. Department of Congenital Heart Disease and Paediatric Cardiology University Hospital Schleswig‐Holstein, Campus Kiel Kiel Germany
2. DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck Kiel Germany
3. Medical Faculty Kiel University Kiel Germany
4. Department of Medical Informatics and Statistics University Hospital Schleswig‐Holstein, Campus Kiel Kiel Germany
5. Department of Paediatric Cardiology Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust London UK
6. National Heart and Lung Institute, Imperial College London UK
7. CMR Unit Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust London UK