1. Princess Máxima Center for Pediatric Oncology Utrecht The Netherlands
2. Department of General Practice/Family Medicine Amsterdam University Medical Center, Vrije Universiteit Medical Center Amsterdam The Netherlands
3. Department of Pediatric Cardiology Amalia Children's Hospital Radboud University Medical Center Nijmegen The Netherlands
4. Department of Pediatrics, Pediatric Cardiology Unit, Tel Aviv Sourasky Medical Centre, Sackler School of Medicine Tel Aviv University Tel Aviv Israel
5. Department of Hematology Radboud University Medical Center Nijmegen The Netherlands
6. Amsterdam UMC, University of Amsterdam, Heart Center; department of Clinical and Experimental Cardiology Amsterdam Cardiovascular Sciences Amsterdam The Netherlands
7. University Medical Center Utrecht Wilhelmina Children's Hospital Utrecht The Netherlands
8. Emma Children's Hospital, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands