1. Department of Pediatrics ZNA Queen Paola Children's Hospital Antwerp Belgium
2. Pediatric Hematology/Oncology Unit, Queen Mathilde Mother and Child Center Antwerp University Hospital Edegem Belgium
3. Department of Pediatric Hematology Oncology UZ Brussel Jette Belgium
4. Faculty of Medicine and Health Sciences University of Brussels Jette Belgium
5. Faculty of Medicine and Health Sciences University of Antwerp Antwerp Belgium
6. Pediatric Cardiology Unit, Queen Mathilde Mother and Child Center Antwerp University Hospital Edegem Belgium