1. National Register for Congenital Heart Defects, DZHK (German Center for Cardiovascular Research) Berlin Germany
2. Competence Network for Congenital Heart Defects, DZHK (German Center for Cardiovascular Research) Berlin Germany
3. Department of Paediatric Cardiology Saarland University Medical Center Homburg Germany
4. Center for Adults with Congenital Heart Defects (EMAH‐Center) University Hospital Muenster Muenster Germany
5. Department for Congenital Heart Disease and Pediatric Cardiology DZHK (German Centre for Cardiovascular Research), University Hospital Schleswig‐Holstein ‐ Campus Kiel Germany
6. Department of Thoracic and Cardiovascular Surgery University Medical Center Tübingen Tübingen Germany
7. Institute for Clinical Genetics, Faculty of Medicine Carl Gustav Carus Dresden Germany