1. German Society for Thoracic and Cardiovascular Surgery, Langenbeck-Virchow-Haus, Berlin, Germany
2. Pediatric Cardiology Department, University of Erlangen, Erlangen, Germany
3. German Pediatric Heart Center, University of Bonn, Bonn, Germany
4. Clinic for Pediatric Cardiology—Congenital Heart Defects, Heart Center Duisburg, Duisburg, Germany
5. Division of Congenital Heart Surgery, Hannover Medical School, Hannover, Germany
6. Division of Pediatric Cardiology and Pediatric Intensive Care; Ludwig Maximilian University of Munich, Munich, Germany
7. BQS Institute for Quality and Patient Safety, Hamburg, Germany
8. National Register for Congenital Heart Defects, Berlin, Germany
9. Department of Pediatric Cardiology, Pulmology and Intensive Care, University Children's Hospital, Tübingen, Germany