1. Department of Neonatology and Paediatrics Curaçao Medical Center J.H.J. Hamelweg Willemstad Curaçao
2. Department of Paediatrics University of Antwerp Edegem Belgium
3. Department of Paediatrics University of Amsterdam Amsterdam The Netherlands
4. Immunohematology Diagnostic Services Sanquin Diagnostic Services Amsterdam The Netherlands
5. Department of Clinical Genetics Amsterdam University Medical Centers Amsterdam The Netherlands
6. Department of Pediatric Hematology, Emma Children's Hospital, Amsterdam UMC University of Amsterdam Amsterdam The Netherlands
7. Department of Clinical Epidemiology Leiden University Medical Center Leiden The Netherlands