1. Department of Pediatric Hematology and Oncology, University Medical Center Utrecht/Wilhelmina Children’s Hospital, Utrecht, The Netherlands;
2. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands;
3. Department of Immunohematology, Sanquin Research, Amsterdam, The Netherlands; and
4. Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands