1. Department of Experimental Immunohematology Sanquin Research Amsterdam the Netherlands
2. Landsteiner Laboratory Amsterdam UMC University of Amsterdam Amsterdam the Netherlands
3. Pediatric and Adolescent Health Division for Oncology and Hematology Aarhus University Hospital Aarhus Denmark
4. Department of Pediatric Hematology University Medical Center Utrecht Utrecht the Netherlands
5. Department of Medical Statistics Leiden University Medical Center Leiden the Netherlands
6. Princess Maxima Center for Pediatric Oncology Utrecht the Netherlands
7. Department of Immunohematology Diagnostics Sanquin Diagnostic Services Amsterdam the Netherlands
8. Center for Clinical Transfusion Research Sanquin Research Leiden the Netherlands
9. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
10. Department of Pediatrics Aalborg University Hospital Aalborg Denmark
11. Department of Immunohematology and Blood Transfusion Leiden University Medical Center Leiden the Netherlands