1. Department of Pediatric Cardiology Erasmus MC, University Medical Center Rotterdam Dr Molewaterplein 60, PO Box 2060 Rotterdam 3000 CB The Netherlands
2. Department of Pediatric Cardiology University of Groningen, University Medical Center Groningen Groningen The Netherlands
3. Leiden University Medical Center, Department of Pediatric Cardiology University of Leiden Leiden The Netherlands
4. Academic Medical Center, Department of Pediatric Cardiology University of Amsterdam Amsterdam The Netherlands
5. Department of Pediatric Cardiology University of Utrecht, Wilhelmina Children's Hospital, University Medical Center Utrecht Utrecht The Netherlands
6. Department of Pediatric Cardiology Free University of Amsterdam, Free University Medical Center Amsterdam The Netherlands
7. Department of Pediatric Cardiology Radboud University Medical Center Nijmegen The Netherlands
8. Department of Cardiothoracic Surgery Erasmus MC, University Medical Center Rotterdam Rotterdam The Netherlands
9. Department of Cardiology Erasmus MC, University Medical Center Rotterdam Rotterdam The Netherlands