1. Department of Pediatric Hematology and Oncology, Radboud University Medical Center; Amalia Children's Hospital; Nijmegen The Netherlands
2. Princess Maxima Center of Pediatric Oncology; Utrecht The Netherlands
3. Department for Health Evidence; Radboud University Medical Center; Nijmegen The Netherlands
4. Department of Pediatrics, Radboud University Medical Center; Amalia Children's Hospital; Nijmegen The Netherlands
5. Pediatric Cardiology Unit; Tel Aviv University; Tel-Aviv Sourasky Medical Centre; Tel Aviv Israel
6. Department of Cardiology; Radboud University Medical Center; Nijmegen The Netherlands
7. Children's Heart Centre, Radboud University Medical Center; Amalia Children's Hospital; Nijmegen The Netherlands